CDC::FromHandle 

static CDC* PASCAL FromHandle( HDC hDC );

Return Value

The pointer may be temporary and should not be stored beyond immediate use.

Parameters

hDC

Contains a handle to a Windows device context.

Remarks

Returns a pointer to a CDC object when given a handle to a device context. If a CDC object is not attached to the handle, a temporary CDC object is created and attached.

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See Also   CDC::DeleteTempMap