Preloads a managed resource.
PreLoad();
None.
Calling this method indicates that the application will need this managed resource shortly. This method has no effect on nonmanaged resources.
IDirect3DResource9::PreLoad detects "thrashing" conditions where more resources are being used in each frame than can fit in video memory simultaneously. Under such circumstances IDirect3DResource9::PreLoad silently does nothing.
Header: Declared in D3d9.h.