|Microsoft DirectX 9.0|
Verifies that the calling process has write access to a memory block. If not, the macro calls the DbgBreak macro.
ValidateWritePtr( const void *p, UINT cb );
Pointer to a memory block.
Size of the memory block, in bytes.
This macro is ignored unless DEBUG, _DEBUG, or VFWROBUST is defined when the DirectShow base-class header file is included. This macro can have a significant performance cost.