How to do a confirm exit and trap any attempt to close the form



		private: System::Void mnuFile_Exit_Click(System::Object^  sender, System::EventArgs^  e)
		{
			DoExit();			//cancel from a menu?
		}


		private: System::Void btnQuit_Click(System::Object^  sender, System::EventArgs^  e) 
		{
			DoExit();			//this will trigger the Form_Closing event
		
		}

		private: void DoExit()
		{
			this->Close();


		}
	
		private: System::Void frmMain_FormClosing(System::Object^  sender, System::Windows::Forms::FormClosingEventArgs^  e) 
		{
		
			//pressing the X, or using the control box, or using ALT-F4 will raise this event automatically
			//---if they say NO to quitting, then cancel the form_closing event. Otherwise, just keep running
			if (MessageBox::Show("Are you sure?", "System Message",
				MessageBoxButtons::YesNo) == System::Windows::Forms::DialogResult::No)

				e->Cancel = true;		//CANCELS THE FORM_CLOSING EVENT and keeps the app running
		
		}