C / C++ / MFC

namespace primoAlpha {

	using namespace System;
	using namespace System::Drawing;
	using namespace System::Windows::Forms;
	using namespace System::Security::Permissions;

	public ref class extendedDateTimePicker : DateTimePicker
	{
	private:		
		Color _BackColor;
	public:
		property Color BackColor  
		{
			virtual Color get() override {
				return _BackColor;
			}
			virtual void set(Color value) override	{
				_BackColor = value;
				Invalidate();
			}
		}

	protected:
		[SecurityPermission(SecurityAction::Demand, Flags=SecurityPermissionFlag::UnmanagedCode)]
		virtual void WndProc( Message% m ) override
		{	
			if ( m.Msg == (int) 0x0014 ) {	//WM_ERASEBKGND
				
				Graphics ^g = Graphics::FromHdc(m.WParam);
				g->FillRectangle(gcnew SolidBrush(_BackColor),
				ClientRectangle);
				g->ReleaseHdc();
				//g->Dispose();
				return;
				
			}
			WndProc(m);
		}
	};

}

CPaintDC dc(pdlg);                  // device context for painting
CFont font;
font.CreateFont(
   24,                        // nHeight
   0,                         // nWidth
   0,                         // nEscapement
   0,                         // nOrientation
   FW_HEAVY,                 // nWeight
   true,                     // bItalic
   true,                     // bUnderline
   0,                         // cStrikeOut
   DEFAULT_CHARSET,              // nCharSet
   OUT_DEVICE_PRECIS,        // nOutPrecision
   CLIP_DEFAULT_PRECIS,       // nClipPrecision
   PROOF_QUALITY ,           // nQuality
   FF_SCRIPT ,  // nPitchAndFamily
   "Times New Roman");                 // lpszFacename
dc.TextOut(15, 100, "welcome", 7);
dc.SelectObject(&font);
font.DeleteObject();