通过

CBaseControlWindow::get_Owner

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Microsoft DirectShow 9.0

CBaseControlWindow::get_Owner

The get_Owner method retrieves the current window owner.

Syntax

  HRESULT get_Owner(
    OAHWND *Owner
);

Parameters

Owner

Pointer to the window owner.

Return Value

Returns an HRESULT value.

Remarks

The video window can play back within a document environment. To do this, the window must be made a child of another window (so that it is clipped and moved appropriately). This property allows the owner of the window to be set and retrieved. When the window is owned by another window, it simply calls the Microsoft Win32 SetParent function. An application calling this function will change the window styles to set the WS_CHILD bit on.

When the window is owned by another window, it will automatically forward certain sets of messages (in particular, mouse and keyboard messages). This allows an application to do simple hot-spot editing and other interactions.

This member function is meant to be called by external objects through the IVideoWindow interface, and therefore locks the critical section to synchronize with the associated filter. Call the CBaseControlWindow::GetOwnerWindow member function to retrieve this property if not calling from an external object.

Requirements

**  Header:** Declared in Ctlutil.h; include Streams.h.

**  Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).

See Also