|Microsoft DirectX 9.0|
The ProgramChanged method is called when information about one or more programs has changed.
HRESULT ProgramChanged( VARIANT varProgramDescriptionID );
[in] Specifies the unique identifier of the program that has changed. Call IGuideData::GetProgramProperties to get information about the program. The value of this parameter may be an empty VARIANT type (VT_EMPTY); if so, examine all of the programs to determine which ones have changed.
Return S_OK if successful, or an error code.