HRESULT GetExtent( DWORD dwDrawAspect, LONG lindex, DVTARGETDEVICE* ptd, LPSIZEL* lpsizel );
See IViewObject2::GetExtent in the Win32 SDK.
Remarks
Retrieves the control's display size in HIMETRIC units (0.01 millimeter per unit) from the control class data member m_sizeExtent.