CBitmap::CreateDiscardableBitmap
Initializes a discardable bitmap that is compatible with the device context identified by pDC.
BOOL CreateDiscardableBitmap(
CDC* pDC,
int nWidth,
int nHeight
);
Parameters
pDC
Specifies a device context.nWidth
Specifies the width (in bits) of the bitmap.nHeight
Specifies the height (in bits) of the bitmap.
Return Value
Nonzero if successful; otherwise 0.
Remarks
The bitmap has the same number of color planes or the same bits-per-pixel format as the specified device context. An application can select this bitmap as the current bitmap for a memory device that is compatible with the one specified by pDC.
Windows can discard a bitmap created by this function only if an application has not selected it into a display context. If Windows discards the bitmap when it is not selected and the application later attempts to select it, the CDC::SelectObject function will return NULL.
When you finish with the CBitmap object created with the CreateDiscardableBitmap function, first select the bitmap out of the device context, then delete the CBitmap object.
Requirements
Header: afxwin.h