# IOleInPlaceActiveObject::OnDocWindowActivate

Notifies the active in-place object when the container’s document window is activated or deactivated.

HRESULT OnDocWindowActivate(

BOOL fActivate | //State of MDI child document window
); |

Parameter

fActivate
  [in] State of the MDI child document window. It is TRUE if the window is in the act of activating; FALSE if it is in the act of deactivating.

Return Value

S_OK
  The method completed successfully.

Remarks

#### Notes to Callers

Call IOleInPlaceActiveObject::OnDocWindowActivate when the MDI child document window is activated or deactivated and the object is currently the active object for the document.

#### Notes to Implementers

You should include code in this method that installs frame-level tools during object activation. These tools include the shared composite menu and/or optional toolbars and frame adornments. You should then take focus. When deactivating, the object should remove the frame-level tools. Note that if you do not call IOleInPlaceUIWindow::SetBorderSpace with pborderwidths set to NULL, you can avoid having to renegotiate border space.

Note While executing IOleInPlaceActiveObject::OnDocWindowActivate, do not make calls to the Windows PeekMessage or GetMessage functions, or a dialog box. Doing so may cause the system to deadlock. There are further restrictions on which OLE interface methods and functions can be called from within OnDocWindowActivate.

See Also

PeekMessage, GetMessage in Win32