Paint problem

Posted on 2003-11-15
Last Modified: 2010-04-02

Iam using StretchDiBits to convert the DIB bitmap to Device context of

my window. It has some problem , sometimes it fails to paint the form DC

whenever i move the mouse over it get repainted.

I even tried using SetDIBitsToDevice , but it didn't  help

Is there i need to do , make this work , here is the code

Question by:Manjesh
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Accepted Solution

georgiek50 earned 100 total points
ID: 9790532
I am not sure if this is what you are talking about but I have a routine in my code that reads a bitmap and then cuts it up into the desired squares getting bitmap handles for each (this is after I've called LoadImage for the DIB)

void cMainSkin::LoadPartialBitmap(void)
      // Function to get a handle for each button bmp

      HDC hdcMain, hdcMem, hdcMem2;
      // Get main window DC and create a memory DC
      hdcMain = GetDC(hwndMain);
      hdcMem  = CreateCompatibleDC(hdcMain);
      hdcMem2 = CreateCompatibleDC(hdcMain);

      // Run a loop seven times for each button
      for (int i = 0; i < 7; i++)
            // Create a compatible bitmap
            hButtonPartialBitmap[i] = CreateCompatibleBitmap(hdcMain, iButtonWidth[i][0],

            // Select the bitmap into the second memory DC
            SelectObject(hdcMem2, hButtonPartialBitmap[i]);

            // Select the button bitmap into the first memory DC
            SelectObject(hdcMem, hButtonBitmap);

            // Copy the desired part of the bitmap into the second memory DC
            BitBlt(hdcMem2, 0, 0, iButtonWidth[i][0], iButtonHeight[i][0],
                     hdcMem, iButtonSourceX[i][0], iButtonSourceY[i][0],

      // Release DC
      ReleaseDC(hwndMain, hdcMain);

      // Delete memory DC

Expert Comment

ID: 10249233
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