🚀 go-pugleaf

Hello,

I am using a function that I found on line to draw a transparent bitmap in 
the window.
This function causing a software crash when I resize a window or move a 
dialog box over the picture.
LoadBitmap returns NULL.

What is wrong with this function?
Does anyone has a complete example similar to this function?

void draw_transparent_picture(
     HWND hwnd,
     int pictid,
     RECT *rct,
     COLORREF transparent_color
     )
{
 BITMAP bitmap;
 COLORREF crOldBack   = 0;
 HDC dcImage     = NULL;
 HDC dcTrans     = NULL;
 HBITMAP pOldBitmapImage  = NULL;
 HBITMAP bitmapTrans   = NULL;
 HBITMAP pOldBitmapTrans  = NULL;
 HBITMAP hBitmap    = NULL;
 HDC hDC      = NULL;
 HDC hMemDC     = NULL;

 hDC = GetDC(hwnd);

 if ((hMemDC = CreateCompatibleDC(hDC)) == (HDC) NULL)
  return;

 hBitmap = LoadBitmap(res_lib, MAKEINTRESOURCE(pictid));// load from 
resource dll

 if (hBitmap == NULL)
  return;

 crOldBack = SetBkColor(hDC, RGB(255, 255, 255));

 // Create two memory dcs for the image and the mask
 dcImage=CreateCompatibleDC(hDC);
 dcTrans=CreateCompatibleDC(hDC);

 // Select the image into the appropriate dc
 pOldBitmapImage = (HBITMAP)SelectObject(dcImage, hBitmap);

 // Create the mask bitmap
 GetObject(hBitmap, sizeof(BITMAP), &bitmap);
 bitmapTrans=CreateBitmap(bitmap.bmWidth, bitmap.bmHeight, 1, 1, NULL);

 // Select the mask bitmap into the appropriate dc
 pOldBitmapTrans = (HBITMAP)SelectObject(dcTrans, bitmapTrans);

 // Build mask based on transparent colour
 SetBkColor(dcImage, transparent_color);
 BitBlt(dcTrans, 0, 0, bitmap.bmWidth, bitmap.bmHeight, dcImage, 0, 0, 
SRCCOPY);

 // Do the work - True Mask method - cool if not actual display
 BitBlt(hDC, rct->left, rct->top, bitmap.bmWidth, bitmap.bmHeight, dcImage, 
0, 0, SRCINVERT);
 BitBlt(hDC, rct->left, rct->top, bitmap.bmWidth, bitmap.bmHeight, dcTrans, 
0, 0, SRCAND);
 BitBlt(hDC, rct->left, rct->top, bitmap.bmWidth, bitmap.bmHeight, dcImage, 
0, 0, SRCINVERT);

 // Restore settings
 SelectObject(dcImage, pOldBitmapImage);
 SelectObject(dcTrans, pOldBitmapTrans);
 SetBkColor(hDC, crOldBack);


 DeleteDC (hMemDC);
 DeleteDC (dcImage);
 DeleteDC (dcTrans);

 ReleaseDC(hwnd, hDC);
}


Thank you
Rony