Application Help Fundamentals

Introduction

When you have created an application, you should assist your users in figuring out how to use your application. You may think about training the users, which is good but may require your physical presence. Online Help is the ability to provide documents that can guide people about your application. Those file should be easily accessible to the users. One to make this possible to attach the files to your application.

There are various small but effective techniques you can use to provide help for your application.

Practical Learning: Introducing Help

1. Start Microsoft Visual Studio
2. Create a new Windows Forms App named BusinessAccounting3
3. In the Solution Explorer, right-click Form1.cs and click Rename
4. Type CompoundedInterest (to get CompoundedInterest.cs) and press Enter twice
5. In the Toolbox, expand Containers. Click GroupBox and click the form
6. Complete the design of the form as follows:

   

   Control		(Name)	Text	Other Properties
   GroupBox			Loan Preparation
   Label			Principal
   TextBox		txtPrincipal		TextAlign: Right
   Label			Interest Rate:
   TextBox		txtInterestRate		TextAlign: Right
   Label			%
   Label			Number of Periods:
   TextBox		txtPeriods		TextAlign: Right
   ComboBox		cbxPeriods		Items: Days Years Months
   GroupBox			Compound Frequency
   RadioButton		rdoDaily	Daily
   RadioButton		rdoWeekly	Weekly
   RadioButton		rdoMonthly	Monthly
   RadioButton		rdoQuaterly	Quaterly
   RadioButton		rdoSemiannualy	Semiannualy
   RadioButton		rdoAnnualy	Annualy
   Button		btnCalculate	Calculate
   GroupBox			Loan Evaluation
   Label			Interest Earned:
   TextBox		txtInterestEarned		TextAlign: Right
   Label			Future Value:
   TextBox		txtFutureValue		TextAlign: Right
   Button		btnClose	Close

A Placeholder for a Text Box

One way to assist a user with text box is to display a suggestive string in a text box. To support this feature, the TextBox class, the parent of the .NET text box control, is equipped with a property named PlaceholderText :

public virtual string PlaceholderText { get; set; }

If you want to use this property, on the form, click a text box. In the Properties window, click the Plageholder field and type the desired string. Normally, you type something that cen suggest to the user what type of value is expected in the text box. The stirng of the placeholder appears when a control looses, or doesn't have, focus. Here are examples:

If the user types a value in the text box, the text of the placeholder disappears. As long as a text box has not received a value and the text box doesn't have focus, the control would display its placeholder text.

Message-Based Help

Status Bar Messages

One way you can provide simple help consists of displaying short indicative messages on a status bar. To do this, you can first create sections, called panels, on a status bar and then display the necessary messages in the section of your choice. The message can be anything but it should consist of just a few words to fit in its section without going over board.

Practical Learning: Helping Through a Status Bar

1. Expand the bottom border of the form a little bit
2. On the Toolbox, expand Menus & Toolbars
3. Click StatusStrip and click the bottom section of the form
4. In the Properties window, change the (Name) to ssStatusBar
5. Still in the Properties window, click Items and click its ellipsis button
6. In the Select Item and Add to List Below combo box, select StatusLabel if necessary and click Add
   On the right side, set the Text to Ready

   

7. Click OK
8. Click an unoccupied area of the form
9. In the Properties window, click the Events button
10. Double-click MouseMove
11. Return to the form
12. On the form, click the txtPrincipal control; that is, the text box on the right side of the Principal label
13. Return to the form
14. In the same way, initiate the MouseMove event for the Interest Rate and the Periods text boxes
15. Return to the form and initiate the MouseMove event for the Periods combo box
16. Return to the form and initiate the MouseMove event for the Daily, the Weekly, the Monthly, the Quaterly, the Semiannually, and the Annually radio buttons
17. Return to the form and initiate the MouseMove event for the Calculate button
18. Return to the form and double-click the Calculate button
19. Return to the form and initiate the MouseMove event for the Interest Earned and the Future Value text boxes
20. Return to the form and initiate the MouseMove event for the Close button
21. Return to the form and double-click the Close button
22. Change the document as follows:

    namespace BusinessAccounting3
    {
        public partial class CompoundedInterest : Form
        {
            public CompoundedInterest()
            {
                InitializeComponent();
            }
    
            private void CompoundedInterest_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "Ready.";
            }
    
            private void txtPrincipal_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "Amount financed or loan amount borrowed.";
            }
    
            private void txtInterestRate_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "The factor by which the principal grows over a period.";
            }
    
            private void txtPeriods_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "The length of the loan in term of months, years, etc.";
            }
    
            private void cbxPeriods_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "The types of the number of periods.";
            }
    
            private void rdoDaily_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "Applied when accrued interest is evaluated daily.";
            }
    
            private void rdoWeekly_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "Interest earned calculated on a weekly basis.";
            }
    
            private void rdoMonthly_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "The interest earned is evaluated every month.";
            }
    
            private void rdoQuarterly_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "Calculation of the accrued interest once in three months.";
            }
    
            private void rdoSemiannually_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "The accrued interest is evaluated once in six months.";
            }
    
            private void rdoAnnually_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "Once in a year, the accrued or earned interest is evaluated.";
            }
    
            private void btnCalculate_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "When values are ready, click this buttong to evaluate the loan.";
            }
    
            private void btnCalculate_Click(object sender, EventArgs e)
            {
                /* A compound type specifies the frequency by which 
                 * the interest is evaluated. The options are that 
                 * the evaluation be made hourly, daily, weekly, biweekly, 
                 * semi-monthly, monthly, quaterly, semi-annually, or annually. */
                double compoundType;
                // The principal is the amount invested in getting a loan or the amount of money borrowed.
                double principal = 0d;
                // The interest rate is the fraction that influence the amount owned by the lender
                double iRate = 0d;
                // The period is the number of units by which the interest accrued is evaluated
                double per = 0d;
    
                if (string.IsNullOrEmpty(txtPrincipal.Text))
                {
                    MessageBox.Show("You must provide a valid number for the principal.",
                                    "Business Accounting", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
    
                if (string.IsNullOrEmpty(txtInterestRate.Text))
                {
                    MessageBox.Show("Please type a valid decimal number for the interest rate.",
                                    "Business Accounting", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
    
                if (string.IsNullOrEmpty(txtPeriods.Text))
                {
                    MessageBox.Show("You are supposed to type a valid number for " +
                                    "the number of days, weeks, months, quarters, or years.",
                                    "Business Accounting", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
    
                try
                {
                    // Retrieve the value of the principal
                    principal = double.Parse(txtPrincipal.Text);
                }
                catch (FormatException fe)
                {
                    MessageBox.Show("There is a problem with the value you provided " +
                                    "for the principal." + Environment.NewLine +
                                    "Please report the error as: " + fe.Message,
                                    "Business Accounting", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
    
                try
                {
                    // Retrieve the interest rate
                    iRate = double.Parse(txtInterestRate.Text);
                }
                catch (FormatException fe)
                {
                    MessageBox.Show("You must provide a valid fractional number for the interest rate." + Environment.NewLine +
                                    "You can present the error as: " + fe.Message,
                                    "Business Accounting", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
    
                try
                {
                    // Get the number of periods
                    per = double.Parse(txtPeriods.Text);
                }
                catch (FormatException fe)
                {
                    MessageBox.Show("Please type the number of days, weeks, months, quarters, or years." + Environment.NewLine +
                                    "The error resulting is: " + fe.Message,
                                    "Business Accounting", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
    
                // Find out what radio button was clicked to apply the compound frequency
                if (rdoDaily.Checked == true)
                    compoundType = 360d;
                else if (rdoWeekly.Checked == true)
                    compoundType = 52d;
                else if (rdoMonthly.Checked)
                    compoundType = 12d;
                else if (rdoQuarterly.Checked)
                    compoundType = 4d;
                else if (rdoSemiannually.Checked)
                    compoundType = 2d;
                else
                {
                    compoundType = 1d;
                    rdoAnnually.Checked = true;
                }
    
                double periods;
    
                if (cbxPeriods.Text == "Days")
                    periods = per / 360d;
                else if (cbxPeriods.Text == "Months")
                    periods = per / 12d;
                else
                {
                    periods = per;
                    cbxPeriods.Text = "Years";
                }
    
                // These values will make the calculation easier to read
                double interestRate = iRate / 100d;
                double i = interestRate / compoundType;
                double n = compoundType * periods;
    
                // Perform the necessary calculations
                // double ratePerPeriod = interestRate / periods;
                double futureValue = principal * Math.Pow(1 + i, n);
                double interestEarned = futureValue - principal;
    
                // Display the values in the appropriate text boxes
                txtInterestEarned.Text = interestEarned.ToString("C");
                txtFutureValue.Text = futureValue.ToString("C");
            }
    
            private void txtInterestEarned_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "The amount acculumated as interest.";
            }
    
            private void txtFutureValue_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "The total amount paied or accumulated at the end of the loan.";
            }
    
            private void btnClose_MouseMove(object sender, MouseEventArgs e)
            {
                ssStatusBar.Items[0].Text = "To end the application, click this button.";
            }
    
            private void btnClose_Click(object sender, EventArgs e)
            {
                Close();
            }
        }
    }

23. To execute the application, press Ctrl + F5

    

24. Position the mouse on some of the controls:

    

    

    

25. After using it, close the form and return to your programming environment
26. From Lesson 12, you should have the following graphics already in your computer; if not, save them:
    Create a Windows Forms App named ObliqueTriangles2
27. In the Solution Explorer, right-click Form1.cs and click Rename
28. Type ObliqueTriangles (to get ObliqueTriangles.cs) and press Enter
29. Read the message on the message box and click Yes
30. Design the form as follows:

    

    Control		(Name)	Text	Other Properties
    Panel		pnlCategories
    Label			Select the Category of Known Values	Font: Times New Roman, 9.75pt, style=Bold
    RadioButton		rdoAAS	AAS - Known Values: Two angles and a side opposite one of them
    RadioButton		rdoASA	ASA - Known Values: Two angles and the side between them
    RadioButton		rdoSAS	SAS - Known Values: Two sides and the angle between them
    RadioButton		rdoSSS	SSS - Known Values: All three sides
    Panel		pnlAAS
    PictureBox		pbxAAS		SizeMode: AutoSize
    Label				BackColor: Blue AutoSize: False
    Label			Known Values	Font: Times New Roman, 12pt, style=Bold
    Label			______________________
    Label			Angle 1:
    TextBox		txtAASAngle1		TextAlign: Right
    Label			Angle 2:
    TextBox		txtAASAngle2		TextAlign: Right
    Label			Side 1
    TextBox		txtAASSide1		TextAlign: Right
    Button		btnAASCalculate	Calculate
    Label			Unknown Values	Font: Times New Roman, 12pt, style=Bold
    Label			______________________
    Label			Angle 3:
    TextBox		txtAASAngle3		TextAlign: Right
    Label			Side 2:
    TextBox		txtAASSide2		TextAlign: Right
    Label			Side 3
    TextBox		txtAASSide3		TextAlign: Right
    Panel		pnlASA
    PictureBox		pbxASA		Image: asa SizeMode: AutoSize
    Label			Known Values	Font: Times New Roman, 12pt, style=Bold
    Label			Angle 1:
    TextBox		txtASAAngle1		TextAlign: Right
    Label			Angle 2:
    TextBox		txtASAAngle2		TextAlign: Right
    Label			Side 1:
    TextBox		txtASASide1		TextAlign: Right
    Button		btnASACalculate	Calculate
    Label			Unknown Values	Font: Times New Roman, 12pt, style=Bold
    Label			Angle 3:
    TextBox		txtASAAngle3		TextAlign: Right
    Label			Side 2:
    TextBox		txtASASide2		TextAlign: Right
    Label			Side 3:
    TextBox		txtASASide3		TextAlign: Right
    Button		btnClose	Close
    Panel		pnlSAS
    PictureBox		pbxSAS		Image: sas SizeMode: AutoSize
    Label			Known Values	Font: Times New Roman, 12pt, style=Bold
    Label			Side 1:
    TextBox		txtSASSide1		TextAlign: Right
    Label			Angle 1:
    TextBox		txtSASAngle1		TextAlign: Right
    Label			Side 2:
    TextBox		txtSASSide2		TextAlign: Right
    Button		btnSASCalculate	Calculate
    Label			Unknown Values	Font: Times New Roman, 12pt, style=Bold
    Label			Side 3:
    TextBox		txtSASSide3		TextAlign: Right
    Label			Angle 2:
    TextBox		txtSASAngle2		TextAlign: Right
    Label			Angle 3:
    TextBox		txtSASAngle3		TextAlign: Right
    Panel		pnlSSS
    PictureBox		pbxSSS		Image: sss SizeMode: AutoSize
    Label			Known Values	Font: Times New Roman, 12pt, style=Bold
    Label			Side 1:
    TextBox		txtSSSSide1		TextAlign: Right
    Label			Side 2:
    TextBox		txtSSSSide2		TextAlign: Right
    Label			Side 3:
    TextBox		txtSSSSide3		TextAlign: Right
    Button		btnSSSCalculate	Calculate
    Label			Unknown Values	Font: Times New Roman, 12pt, style=Bold
    Label			Angle 1:
    TextBox		txtSSSAngle1		TextAlign: Right
    Label			Angle 2:
    TextBox		txtSSSAngle2		TextAlign: Right
    Label			Angle 3:
    TextBox		txtSSSAngle3		TextAlign: Right

31. Double-click an unoccupied area of the form
32. Return to the form and double-click the AAS radio button
33. Return to the form and double-click the ASA radio button
34. Return to the form and double-click the SAS radio button
35. Return to the form and double-click the SSS radio button
36. Return to the form and double-click the Calculate button in the AAS panel
37. Return to the form and double-click the Calculate button in the ASA panel
38. Return to the form and double-click the Calculate button in the SAS panel
39. Return to the form and double-click the Calculate button in the SSS panel
40. Return to the form and double-click the Close button
41. Change the document as follows:

    namespace ObliqueTriangles2
    {
        public partial class ObliqueTriangles : Form
        {
            public ObliqueTriangles()
            {
                InitializeComponent();
            }
    
            private void ObliqueTriangles_Load(object sender, EventArgs e)
            {
                pnlSSS.Location = pnlSAS.Location = pnlASA.Location = pnlAAS.Location;
                rdoAAS.Checked  = true;
                rdoAAS_CheckedChanged(sender, e);
            }
    
            private void rdoAAS_CheckedChanged(object sender, EventArgs e)
            {
                pnlAAS.BringToFront();
            }
    
            private void rdoASA_CheckedChanged(object sender, EventArgs e)
            {
                pnlASA.BringToFront();
            }
    
            private void rdoSAS_CheckedChanged(object sender, EventArgs e)
            {
                pnlSAS.BringToFront();
            }
    
            private void rdoSSS_CheckedChanged(object sender, EventArgs e)
            {
                pnlSSS.BringToFront();
            }
    
            private void btnAASCalculate_Click(object sender, EventArgs e)
            {
                double angle1 = 0.00, angle2 = 0.00, side1 = 0.00;
    
                try
                {
                    angle1 = double.Parse(txtAASAngle1.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You must type a value for the lower left angle of the AAS shape.", "Obliques Triangles");
                }
    
                try
                {
                    angle2 = double.Parse(txtAASAngle2.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You must type a value for the lower right angle of the AAS shape.", "Obliques Triangles");
                }
    
                try
                {
                    side1 = double.Parse(txtAASSide1.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You must type a value for the right side of the AAS shape.", "Obliques Triangles");
                }
    
                // Here, we use the law of sines
                double angle3 = 180 - (angle1 + angle2);
                double side2  = side1 * Math.Sin(angle2 * Math.PI / 180) / Math.Sin(angle1 * Math.PI / 180);
                double side3  = side1 * Math.Sin(angle3 * Math.PI / 180) / Math.Sin(angle1 * Math.PI / 180);
    
                txtAASAngle3.Text = angle3.ToString();
                txtAASSide2.Text  = side2.ToString();
                txtAASSide3.Text  = side3.ToString();
            }
    
            private void btnASACalculate_Click(object sender, EventArgs e)
            {
                double angle1 = 0.00, side1 = 0.00, angle2 = 0.00;
    
                try
                {
                    angle1 = double.Parse(txtASAAngle1.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You must type a value for the lower left angle of the ASA shape.", "Obliques Triangles");
                }
    
                try
                {
                    side1 = double.Parse(txtASASide1.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You must type a value for the bottom side of the AAS shape.", "Obliques Triangles");
                }
    
                try
                {
                    angle2 = double.Parse(txtASAAngle2.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You must type a value for the lower right angle of the ASA shape.", "Obliques Triangles");
                }
    
                double angle3 = 180 - (angle1 + angle2);
                double side2  = side1 * Math.Sin(angle2 * Math.PI / 180) / Math.Sin(angle1 * Math.PI / 180);
                double side3  = side1 * Math.Sin(angle3 * Math.PI / 180) / Math.Sin(angle1 * Math.PI / 180);
    
                txtASAAngle3.Text = angle3.ToString();
                txtASASide2.Text = side3.ToString();
                txtASASide3.Text = side2.ToString();
            }
    
            private void btnSASCalculate_Click(object sender, EventArgs e)
            {
                double side1 = 0.00, angle1 = 0.00, side2 = 0.00;
    
                try
                {
                    side1 = double.Parse(txtSASSide1.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You must type a value for the left side of the SAS shape.", "Obliques Triangles");
                }
    
                try
                {
                    angle1 = double.Parse(txtSASAngle1.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You must type a value for the top angle of the SAS shape.", "Obliques Triangles");
                }
    
                try
                {
                    side2 = double.Parse(txtSASSide2.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You must type a value for the right side of the SAS shape.", "Obliques Triangles");
                }
    
                // Here, we use the law of cosines
                double side3 = Math.Sqrt((side1 * side1) +
                                         (side2 * side2) -
                                         (2 * side1 * side2 * Math.Cos(angle1 * Math.PI / 180)));
                double angle2 = Math.Acos(((side3 * side3) +
                                           (side2 * side2) -
                                           (side1 * side1)
                                          ) / (2 * side3 * side2)) * 180 / Math.PI;
                double angle3 = 180 - (angle1 + angle2);
    
    
                txtSASSide3.Text  = side3.ToString();
                txtSASAngle2.Text = angle2.ToString();
                txtSASAngle3.Text = angle3.ToString();
            }
    
            private void btnSSSCalculate_Click(object sender, EventArgs e)
            {
                double side1 = 0.00, side2 = 0.00, side3 = 0.00;
    
                try
                {
                    side1 = double.Parse(txtSSSSide1.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You must type a value for the left side of the SSS shape.", "Obliques Triangles");
                }
    
                try
                {
                    side2 = double.Parse(txtSSSSide2.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You must type a value for the right side of the SSS shape.", "Obliques Triangles");
                }
    
                try
                {
                    side3 = double.Parse(txtSSSSide3.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You must type a value for the bottom side of the SSS shape.", "Obliques Triangles");
                }
    
                // Here, we use the law of cosines
                double angle1 = Math.Acos(((side3 * side3) +
                                           (side2 * side2) -
                                           (side1 * side1)
                                          ) / (2 * side3 * side2)) * 180 / Math.PI;
                double angle2 = Math.Acos(((side3 * side3) +
                                           (side1 * side1) -
                                           (side2 * side2)
                                          ) / (2 * side3 * side1)) * 180 / Math.PI;
                double angle3 = 180 - (angle1 + angle2);
    
    
                txtSSSAngle1.Text = angle1.ToString();
                txtSSSAngle2.Text = angle2.ToString();
                txtSSSAngle3.Text = angle3.ToString();
            }
    
            private void btnClose_Click(object sender, EventArgs e)
            {
                Close();
            }
        }
    }

42. Return to the form

Tool Tips

A tool tip is a small yellow box that displays a word or a group of words when the user positions the mouse on top of a control:

To create a tool tip system in a Windows Forms application, first add a ToolTip control to a form. After adding a ToolTip control, the form and all controls on it receive a new field in the Properties window. If the new ToolTip control is called ToolTip1, the new field in the Properties window for each control is ToolTip on ToolTip1. To display a tool tip for a control, first click it on the form. Then, in the Properties window, click ToolTip on ToolTip1, and type the desired tool tip.

Practical Learning: Adding Tool Tips

1. To prepare for tool tips, in the Common Controls section of the Toolbox, click ToolTip and click the form
2. In the Properties window, change the (Name) to ttObliqueTriangles
3. On the form, click each control and, in the Properties window, set its ToolTip On ttObliqueTriangles property as follows:
   

   Control	ToolTip On ttObliqueTriangles
   rdoAAS	Selection to make if the value of one side, the angle oppsosite to that side, and another angle are known. The law of Sines is used to calculate the unknown values.
   rdoASA	In this option, two angles are known. Also, the side between those angles is known. Use the law of Sines to find the unknown angle and the other two unknown sides.
   rdoSAS	With SAS, the values of two sides and the angle between them are known. Use the law of Cosines to calculate the unknown side and the values of the other two angles.
   rdoSSS	Knowing the values of all three sides of a triangle (SSS), use the law of Cosines to calculate the unknown values of the angles.
   txtAASAngle1	Value for one of the known angles
   txtAASAngle2	Value for one of the known angles
   txtAASSide1	Value for the known side
   btnAASCalculate	Make sure you first provide the values for the known angles and the known side.
   txtAASAngle3	Calculated value for the unknown angle
   txtAASSide2	Calculated value for one of the unknown sides
   txtAASSide3	Calculated value for one of the unknown sides
   txtASAAngle1	In this ASA situation, type the value of one of the known angles.
   txtASASide1	In this ASA situation, type the value for the known side.
   txtASAAngle2	Type the value of the other known angle.
   btnASACalculate	Make sure you provide the values for the known angles and the known side.
   txtASAAngle3	Calculated value for the unknown angle.
   txtASASide2	Calculated value for one of the unknown sides.
   txtASASide3	Calculated value for one of the unknown sides.
   txtSASSide1	Knowing the angle included in two known sides, type the value of one of the available sides.
   txtSASAngle1	Type the known value of the angle between two known sides.
   txtSASSide2	Enter the value of the second known sides.
   btnSASCalculate	Make sure you first provide the values for the known sides and the known angle.
   txtSASSide3	Calculated value for the unknown side
   txtSASAngle2	Calculated value for one of the unknown angles.
   txtSASAngle3	Calculated value for one of the unknown angles.
   txtSSSSide1	All three sides are known. Type the value of one of them.
   txtSSSSide2	The values of all three sides must be available. Type one of them.
   txtSSSSide3	Enter the third known side
   btnSSSCalculate	Make sure you first provide the values for the known sides
   txtSSSAngle1	Calculated value for one of the angles.
   txtSSSAngle2	Calculated value for one of the angles.
   txtSSSAngle3	Calculated value for one of the angles.
   btnClose	Click here to close the form

4. Resize the form as follows:

   

5. To execute, on the main menu, click Debug -> Start Without Debugging
6. Position the mouse on different controls on the form:

   

   

7. Close the form and return to your programming environment
8. Close your programming environment

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