Warning: This method 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.
Prevents a system-memory surface from being paged out while a blit operation that uses direct memory access (DMA) transfers to or from system memory is in progress. Deprecated.
