#include <commdlg.h>
COLORREF stdColor = RGB(255,255,255);
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM
	 lParam)
{
   static CHOOSECOLOR ccs;
   static COLORREF acrCustClr[16];
   static HBRUSH hBrush;
   switch (message)
   {
   case WM_CREATE:
      ccs.lStructSize = sizeof(CHOOSECOLOR);
      ccs.hwndOwner = hWnd;
      ccs.rgbResult = stdColor;
      ccs.Flags = CC_RGBINIT | CC_FULLOPEN;
      ccs.lpCustColors = (LPDWORD)acrCustClr;
      break;
   case WM_COMMAND:
      switch (LOWORD(wParam))
      {
      case ID_STDCOLOR:

      if (ChooseColor(&ccs))
      {
         stdColor = ccs.rgbResult;
         if (hBrush) DeleteObject(hBrush);
         hBrush = CreateSolidBrush(stdColor);
         SetClassLong(hWnd, GCL_HBRBACKGROUND, (LONG)hBrush);
         InvalidateRect(hWnd, NULL, TRUE);
	  }
      break;
   case IDM_EXIT: DestroyWindow (hWnd); break;
   default: return DefWindowProc(hWnd, message, wParam, lParam) ;
	  }
   break;
  case WM_DESTROY: PostQuitMessage(0); break;
  default: return DefWindowProc(hWnd, message, wParam, lParam);
   }
  return 0;
}