HRESULT GetExtent( DWORD dwDrawAspect, SIZEL* psizel );
See IOleObject::GetExtent in the Win32 SDK.
Remarks
Retrieves a running control's display size in HIMETRIC units (0.01 millimeter per unit). The size is stored in the control class data member m_sizeExtent.
IOleObjectImpl Overview | Class Members
See Also IOleObjectImpl::SetExtent