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COleControl::OnGetViewExtent

  • Статья

Called by the framework in response to a container's IViewObject2::GetExtent request.

virtual BOOL OnGetViewExtent(
   DWORD dwDrawAspect,
      LONG lindex,
      DVTARGETDEVICE* ptd,
      LPSIZEL lpsizel 
);

Параметры

  • 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.

Возвращаемое значение

Nonzero if extent information is successfully returned; otherwise 0.

Заметки

Override this function if your control uses two-pass drawing, and its opaque and transparent parts have different dimensions.

Требования

Header: afxctl.h

См. также

Основные понятия

COleControl Class

COleControl Members

Hierarchy Chart

COleControl::OnGetViewRect