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Bitmaps

GDI bitmaps are supported in MFC by the CBitmap class. Constructing a bitmap is a two-step process. First, the MFC CBitmap object must be created; next, one of the initialization functions must be called to create the GDI bitmap object.

The initialization functions include LoadBitmap, LoadOEMBitmap, LoadMappedBitmap, CreateBitmap, CreateBitmapIndirect, CreateCompatibleBitmap, and CreateDiscardableBitmap.

To obtain a pointer to a BITMAP structure representing the GDI bitmap the CBitmap object is attached to, call the GetBitmap member function. You can also use CBitmap objects in place of handles of type HBITMAP in GDI function calls, thanks to the presence of the operator HBITMAP operator function.

The bits in a bitmap can be set or read using the SetBitmapBits and GetBitmapBits member functions. You can also assign a width and a height to the bitmap (in LOMETRIC units) using SetBitmapDimension. However, these values are only used as return values with GetBitmapDimension and serve no other purpose.

MFC Example