This topic documents a feature of Visual Filters and Transitions, which is deprecated as of Windows Internet Explorer 9 and obsolete as of Internet Explorer 10.
Determines whether a transform input has changed since the last time this method was called.
bool IsInputDirty( ULONG i );
- [in] Index of the requested input surface (for transforms with multiple inputs). The default value is zero.
Returns a Boolean value that is TRUE if the specified transform input has changed since the last time this method was called, or FALSE otherwise.