IViewObject2::GetExtent (Windows Embedded CE 6.0)

[アーティクル]
01/05/2012

1/6/2010

This method returns the size that the specified view object will be drawn on the specified target device.

Syntax

HRESULT GetExtent(
  DWORD dwAspect,
  LONG lindex,
  DVTARGETDEVICE ptd,
  LPSIZEL lpsizel
);

Parameters

dwAspect
[in] Requested view of the object whose size is of interest. Valid values are taken from the enumerations DVASPECT and from DVASPECT2.

Newer objects and containers that support optimized drawing interfaces support the DVASPECT2 enumeration values.

Older objects and containers that do not support optimized drawing interfaces may not support DVASPECT2.

lindex
[in] Portion of the object that is of interest. Currently only -1 is valid.

ptd
[in] Pointer to the DVTARGETDEVICE structure defining the target device for which the object's size should be returned.

lpsizel
[out] Pointer to where the object's size is returned.

Return Value

This method supports the standard return value E_OUTOFMEMORY.

If the method returns S_OK, the object's extent was successfully returned.

If OLE_E_BLANK is returned, an appropriate cache is not available.

Remarks

The OLE-provided implementation of IViewObject2::GetExtent searches the cache for the size of the view object.

The IOleObject::GetExtent method provides some of the same information as IViewObject2::GetExtent.

Note

This method must return the same size as DVASPECT_CONTENT for all the new aspects in DVASPECT2. The IOleObject::GetExtent method must do the same thing.

If one of the new aspects is requested in dwAspect, this method can either fail or return the same rectangle as for the DVASPECT_CONTENT aspect.

Note to Callers

To prevent the object from being run if it is not already running, you can call IViewObject2::GetExtent rather than IOleObject::GetExtent to determine the size of the presentation to be drawn.

To determine whether the platform supports this interface, see Determining Supported COM APIs.

Requirements

Header	Oleidl.h, oleidl.idl
Library	ole32.lib, uuid.lib
Windows Embedded CE	Windows CE 3.0 and later

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