PRB: GetObject() Always Returns Positive Height For DIB Sections

MORE INFORMATION

Sample Code

   // Code to create a DIB section that will be used as
   // a test case.
   HBITMAP CreateADIBSection(int iWidth, int iHeight)
   {
       BITMAPINFO bmi;
       BYTE *pBits;
       HDC hdc = GetDC(NULL);
       HBITMAP hbm;
				

       // Initialize the header.
       bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
       bmi.bmiHeader.biWidth = iWidth;
       bmi.bmiHeader.biHeight = iHeight;
       bmi.bmiHeader.biPlanes = 1;
       bmi.bmiHeader.biBitCount = 24;
       bmi.bmiHeader.biCompression = BI_RGB;
				

       // Create the surface.
       hbm = CreateDIBSection(hdc,        // Handle to device context.
                              &bmi,       // Pointer to creation parameters
                              DIB_RGB_COLORS,   // Unused.
                              &pBits,     // Address of pointer to surface.
                              NULL,       // No file mapping object.
                              0);         // No offset.
				

       // Clean up.
       ReleaseDC(NULL, hdc);
				

   }
				

   // Create a DIB section with a negative height, and then
   // display its height as returned from GetObject().
   {
       char       szMessage[128];
       int        nHeight = -100;
       HBITMAP    hbm = CreateADIBSection(10, nHeight); // Create a test
                                                        // case.
       DIBSECTION ds;
				

       // Fill out a DIBSECTION for the test case.
       GetObject(hbm, sizeof(ds), &ds);
				

   }