System::Void btnSave_Click(System::Object *  sender, System::EventArgs *  e)
{
	 String *strFilename = String::Concat(this->dtpFilename->Text, S".xml");
	 XmlDocument *docXML = new XmlDocument();
	 String *strContent = 0;
	 String *strTotalOrder = this->txtTotalOrder->Text;
	 String *strParentOrder = 0;

	 if( this->chkKeepRemove1->Checked == true )
	 {
		 strContent = String::Concat(strContent,
			S"<PartSold><PartNumber>", this->txtPartNumber1->Text, S"</PartNumber>",
			            S"<PartName>", this->txtPartName1->Text, S"</PartName>",
			              S"<UnitPrice>", this->txtUnitPrice1->Text, S"</UnitPrice>",
			              S"<Qty>", this->txtQuantity1->Text, S"</Qty>",
			       S"<SubTotal>", this->txtSubTotal1->Text, S"</SubTotal></PartSold>");
	 }

	 if( this->chkKeepRemove2->Checked == true )
	 {
		 strContent = String::Concat(strContent,
			  S"<PartSold><PartNumber>", this->txtPartNumber2->Text, S"</PartNumber>",
				 S"<PartName>", this->txtPartName2->Text, S"</PartName>",
				 S"<UnitPrice>", this->txtUnitPrice2->Text, S"</UnitPrice>",
				 S"<Qty>", this->txtQuantity2->Text, S"</Qty>",
			 S"<SubTotal>", this->txtSubTotal2->Text, S"</SubTotal></PartSold>");
	 }

	 if( this->chkKeepRemove3->Checked == true )
	 {
		 strContent = String::Concat(strContent,
			S"<PartSold><PartNumber>", this->txtPartNumber3->Text, S"</PartNumber>",
				 S"<PartName>", this->txtPartName3->Text, S"</PartName>",
				 S"<UnitPrice>", this->txtUnitPrice3->Text, S"</UnitPrice>",
				 S"<Qty>", this->txtQuantity3->Text, S"</Qty>",
			 S"<SubTotal>", this->txtSubTotal3->Text, S"</SubTotal></PartSold>");
	 }

	 if( this->chkKeepRemove4->Checked == true )
	 {
		 strContent = String::Concat(strContent,
			S"<PartSold><PartNumber>", this->txtPartNumber4->Text, S"</PartNumber>",
				 S"<PartName>", this->txtPartName4->Text, S"</PartName>",
				 S"<UnitPrice>", this->txtUnitPrice4->Text, S"</UnitPrice>",
				 S"<Qty>", this->txtQuantity4->Text, S"</Qty>",
			S"<SubTotal>", this->txtSubTotal4->Text, S"</SubTotal></PartSold>");
	 }

	 if( this->chkKeepRemove5->Checked == true )
	 {
		 strContent = String::Concat(strContent, 
			S"<PartSold><PartNumber>", this->txtPartNumber5->Text, S"</PartNumber>",
				 S"<PartName>", this->txtPartName5->Text, S"</PartName>",
				 S"<UnitPrice>", this->txtUnitPrice5->Text, S"</UnitPrice>",
				 S"<Qty>", this->txtQuantity5->Text, S"</Qty>",
			 S"<SubTotal>", this->txtSubTotal5->Text, S"</SubTotal></PartSold>");
	 }

	 if( this->chkKeepRemove6->Checked == true )
	 {
		 strContent = String::Concat(strContent, 
			S"<PartSold><PartNumber>", this->txtPartNumber6->Text, S"</PartNumber>",
				S"<PartName>", this->txtPartName6->Text, S"</PartName>",
				 S"<UnitPrice>", this->txtUnitPrice6->Text, S"</UnitPrice>",
				 S"<Qty>", this->txtQuantity6->Text, S"</Qty>",
			 S"<SubTotal>", this->txtSubTotal6->Text, S"</SubTotal></PartSold>");
	 }

	 if( File::Exists(strFilename) )
	 {
		 // If the file exists already, open it
		 docXML->Load(strFilename);
		 // Get a reference to the root element
		 XmlElement *elmRoot = docXML->DocumentElement;
		 // Get a reference to the last child of the root
		 XmlNode *nodLastOrder = elmRoot->LastChild;
		 // Get the OrderNumber attribute of the last order and increment it by 1
int NewOrderNumber = nodLastOrder->Attributes->ItemOf[S"OrderNumber"]->InnerText->ToInt32(0) + 1;

		 // Create a new order as an element
		 XmlElement *elmNewOrder = docXML->CreateElement(S"Order");
		 // Add its attributes
		 elmNewOrder->SetAttribute(S"OrderNumber", NewOrderNumber.ToString());
		 elmNewOrder->SetAttribute(S"TotalOrder", strTotalOrder);
		 elmNewOrder->InnerXml = strContent;
		 docXML->DocumentElement->AppendChild(elmNewOrder);
		 docXML->Save(strFilename);
	 }
	 else
	 {
		 // If the file doesn't exist, get ready to create it
strParentOrder = String::Concat(S"<Order OrderNumber=\"1\" TotalOrder=\"", strTotalOrder, S"\">");

		 // If the file doesn't exist, create it
		 docXML->LoadXml(String::Concat(S"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
					S"<Orders>",
					strParentOrder, strContent, S"</Order></Orders>"));
		 docXML->Save(strFilename);
	 }

	 // Reset the Order Processing form
	 this->lvwAvailableParts->Items->Clear();
	 this->cboCategories->SelectedIndex = -1;
	 this->cboModels->SelectedIndex     = -1;
	 this->cboMakes->SelectedIndex      = -1;
	 this->cboYears->SelectedIndex      = -1;
	 this->chkKeepRemove1->Checked = false;
	 this->chkKeepRemove2->Checked = false;
	 this->chkKeepRemove3->Checked = false;
	 this->chkKeepRemove4->Checked = false;
	 this->chkKeepRemove5->Checked = false;
	 this->chkKeepRemove6->Checked = false;
	 this->CalculateTotalOrder();
}