| Microsoft DirectX 8.1 (C++) |
The IAMOverlayFX interface is implemented on the Overlay Mixer filter. This interface enables applications to control how the video overlay appears on the user's screen.
In addition to the methods inherited from IUnknown, the IAMOverlayFX interface exposes the following methods.
| Method | Description |
| QueryOverlayFXCaps | Retrieves information about which overlay effects are available to the Overlay Mixer filter. |
| SetOverlayFX | Applies the specified effects to the overlay surface. |
| GetOverlayFX | Retrieves the effects currently applied to the overlay surface, if any. |