Warning: This property is deprecated. Deprecated components of Microsoft DirectX 9.0 for Managed Code are considered obsolete. While these components are still supported in this release of DirectX 9.0 for Managed Code, they may be removed in the future. When writing new applications, you should avoid using these deprecated components. When modifying existing applications, you are strongly encouraged to remove any dependency on these components.
Supports alpha-only surfaces. The bit depth of an alpha-only surface can be 1, 2, 4, or 8. The alpha value becomes more opaque as the alpha value increases. Regardless of the depth of the alpha information, 0 is always the fully transparent value. Used for overlays. Deprecated.
Definition
Visual Basic
Public ReadOnly Property OverlayAlphaSurfaces As Boolean