Дескриптор окна Hwnd...

BOOL LoadBitmapFromBMPFile( LPTSTR szFileName, HBITMAP *phBitmap,
   HPALETTE *phPalette )
   {

   BITMAP  bm;

   *phBitmap = NULL;
   *phPalette = NULL;

   // Use LoadImage() to get the image loaded into a DIBSection
   *phBitmap = (HBITMAP)LoadImage( NULL, szFileName, IMAGE_BITMAP, 0, 0,
               LR_CREATEDIBSECTION | LR_DEFAULTSIZE | LR_LOADFROMFILE );
   if( *phBitmap == NULL )
     return FALSE;

   // Get the color depth of the DIBSection
   GetObject(*phBitmap, sizeof(BITMAP), &bm );
   // If the DIBSection is 256 color or less, it has a color table
   if( ( bm.bmBitsPixel * bm.bmPlanes ) <= 8 )
   {
   HDC           hMemDC;
   HBITMAP       hOldBitmap;
   RGBQUAD       rgb[256];
   LPLOGPALETTE  pLogPal;
   WORD          i;

   // Create a memory DC and select the DIBSection into it
   hMemDC = CreateCompatibleDC( NULL );
   hOldBitmap = (HBITMAP)SelectObject( hMemDC, *phBitmap );
   // Get the DIBSection's color table
   GetDIBColorTable( hMemDC, 0, 256, rgb );
   // Create a palette from the color tabl
   pLogPal = (LOGPALETTE *)malloc( sizeof(LOGPALETTE) + (256*sizeof(PALETTEENTRY)) );
   pLogPal->palVersion = 0x300;
   pLogPal->palNumEntries = 256;
   for(i=0;i<256;i++)
   {
     pLogPal->palPalEntry.peRed = rgb.rgbRed;
     pLogPal->palPalEntry.peGreen = rgb.rgbGreen;
     pLogPal->palPalEntry.peBlue = rgb.rgbBlue;
     pLogPal->palPalEntry.peFlags = 0;
   }
   *phPalette = CreatePalette( pLogPal );
   // Clean up
   free( pLogPal );
   SelectObject( hMemDC, hOldBitmap );
   DeleteDC( hMemDC );
   }
   else   // It has no color table, so use a halftone palette
   {
   HDC    hRefDC;

   hRefDC = GetDC( NULL );
   *phPalette = CreateHalftonePalette( hRefDC );
   ReleaseDC( NULL, hRefDC );
   }
   return TRUE;

   }

case WM_PAINT:
   {
     PAINTSTRUCT   ps;
     HBITMAP       hBitmap, hOldBitmap;
     HPALETTE      hPalette, hOldPalette;
     HDC           hDC, hMemDC;
     BITMAP        bm;

   hDC = BeginPaint( hWnd, &ps );

   if( LoadBitmapFromBMPFile( szFileName, &hBitmap, &hPalette ) )
   {
      GetObject( hBitmap, sizeof(BITMAP), &bm );
      hMemDC = CreateCompatibleDC( hDC );
      hOldBitmap = (HBITMAP)SelectObject( hMemDC, hBitmap );
      hOldPalette = SelectPalette( hDC, hPalette, FALSE );
      RealizePalette( hDC );

      BitBlt( hDC, 0, 0, bm.bmWidth, bm.bmHeight,
              hMemDC, 0, 0, SRCCOPY );

      SelectObject( hMemDC, hOldBitmap );
      DeleteObject( hBitmap );
      SelectPalette( hDC, hOldPalette, FALSE );
      DeleteObject( hPalette );
   }
   EndPaint( hWnd, &amp;ps );

   }
   break;

void __fastcall TForm1::Button1Click(TObject *Sender)

{
  Graphics::TBitmap *pBitmap = new Graphics::TBitmap();
  try
  {
    pBitmap->LoadFromFile("C:\\Program Files\\Common Files\\Borland Shared\\Images\\Splash\\256color\\factory.bmp ");
    pBitmap->Transparent = true;
    pBitmap->TransparentColor = pBitmap->Canvas->Pixels[50,50];
    Form1->Canvas->Draw(0,0,pBitmap);
    pBitmap->TransparentMode = tmAuto;  
    Form1->Canvas->Draw(50,50,pBitmap);
  }
  catch (...)

  {
    ShowMessage("Could not load or display bitmap");
  }
  delete pBitmap;
}