Color Changer

This exercise combines a panel, a button, and three scroll bars combined to create an application.

Prerequisites:
Panel
Button
TrackBar

1. Start a new Windows Forms Application project and name it ColorChanger1
2. Design the form as follows:
    

   Control Name Text Other Properties Panel pnlPreview   BackColor: Blue BorderStyle: Fixed3d TrackBar trbRed Maximum: 255 TickFrequency: 15 TrackBar trbGreen   Maximum: 255 TickFrequency: 15 TrackBar trbBlue   Maximum: 255 TickFrequency: 15 Value: 255 Label   R   Label   G   Label B Button btnClose Close

3. Double-click the left track bar and implement its event as follows:
    

   System::Void trbRed_Scroll(System::Object^ sender, System::EventArgs^ e) { int RedValue = trbRed->Value; int GreenValue = trbGreen->Value; int BlueValue = trbBlue->Value; pnlPreview->BackColor = System::Drawing::Color::FromArgb(RedValue, GreenValue, BlueValue); }

4. Return to the form
5. Double-click the middle track bar and implement its event as follows:
    

   System::Void trbGreen_Scroll(System::Object^ sender, System::EventArgs^ e) { int RedValue = trbRed->Value; int GreenValue = trbGreen->Value; int BlueValue = trbBlue->Value; pnlPreview->BackColor = System::Drawing::Color::FromArgb(RedValue, GreenValue, BlueValue); }

6. Return to the form
7. Double-click the right track bar and implement its event as follows:
    

   System::Void trbBlue_Scroll(System::Object^ sender, System::EventArgs^ e) { int RedValue = trbRed->Value; int GreenValue = trbGreen->Value; int BlueValue = trbBlue->Value; pnlPreview->BackColor = System::Drawing::Color::FromArgb(RedValue, GreenValue, BlueValue); }

8. Return to the form
9. Double-click the Close button to access its Click() event and implement it as follows:
    

   System::Void btnClose_Click(System::Object^ sender, System::EventArgs^ e) { Close(); }

10. Test the application
11. Close the form