IOverlay::Advise
A version of this page is also available for
4/8/2010
This method sets up an advise link for the overlay events specified by the dwInterests parameter.
Syntax
HRESULT Advise(
IOverlayNotify* pOverlayNotify,
DWORD dwInterests
);
Parameters
- pOverlayNotify
[in] Notification interface.
dwInterests
[in] Callbacks of interest, which can be any subset of the following events.Value Description ADVISE_NONE
No changes.
ADVISE_CLIPPING
Change in clipping region (synchronized with the window).
ADVISE_PALETTE
Change in palette.
ADVISE_COLORKEY
Change of chroma key value.
ADVISE_POSITION
Change in position of video window (not synchronized with the window).
ADVISE_ALL
All of the above.
Return Value
None.
Remarks
This method sets up an advise link for the IOverlayNotify interface to receive notifications.
If one of these events occurs, the appropriate entry point in the pOverlayNotify parameter passed in is called (IOverlayNotify::OnClipChange, IOverlayNotify::OnColorKeyChange, IOverlayNotify::OnPaletteChange, or IOverlayNotify::OnPositionChange).
Only one advise link can be set on any given IOverlay interface.
Trying to set another notification interface on second and subsequent calls returns VFW_E_ADVISE_ALREADY_SET.
You can cancel an advise link by using IOverlay::Unadvise.
Requirements
| Windows Embedded CE | Windows CE 2.12 and later |
| Windows Mobile | Pocket PC for Windows Mobile Version 5.0 and later, Smartphone for Windows Mobile Version 5.0 and later |
| Note | Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment, Version 2.12 requires DXPAK 1.0 or later |