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Called by the framework in response to a container's IViewObject2::GetExtent request.
virtual BOOL OnGetViewExtent(
DWORD dwDrawAspect,
LONG lindex,
DVTARGETDEVICE* ptd,
LPSIZEL lpsizel
);
Parameters
dwDrawAspect
DWORD describing which form, or aspect, of an object is to be displayed. Valid values are taken from the enumeration DVASPECT or DVASPECT2.lindex
The portion of the object that is of interest. Currently only –1 is valid.ptd
Points to the DVTARGETDEVICE structure defining the target device for which the object's size should be returned.lpsizel
Points to the location where the object's size is returned.
Return Value
Nonzero if extent information is successfully returned; otherwise 0.
Remarks
Override this function if your control uses two-pass drawing, and its opaque and transparent parts have different dimensions.
Requirements
Header: afxctl.h