Strange error with CreateCompatibleDC
- by sevaxx
Maybe this is a foolish question, I can't see why I can not get a DC created in the following code :
HBITMAP COcrDlg::LoadClippedBitmap(LPCTSTR pathName,UINT maxWidth,UINT maxHeight)
{
HBITMAP hBmp = (HBITMAP)::LoadImage(NULL, pathName, IMAGE_BITMAP, 0, 0,
LR_LOADFROMFILE | LR_CREATEDIBSECTION);
if (!hBmp)
return NULL;
HDC hdc = (HDC)GetDC();
HDC hdcMem = CreateCompatibleDC(hdc);
if (!hdcMem)
{
DWORD err = GetLastError();
}
...
...
...
The bitmap hBmp is loaded fine and hdc has a valid value. But the call to CreateCompatibleDC() returns a NULL pointer. Then, GetLastError() returns 0 !
Anybody can guess what's going on here , please ?
PS : There are no memory allocations or GDI routines called before this one...so I think memory leaks should be ruled out.
