Return Codes

Return Code	Reason
fsNoErr	Operation has completed without error.
fsBadFormatIndex	Return from fsGetPixelFormatsSupported when all pixel formats have been enumerated.
fsDoNotCacheOnLoad	Return from fsCacheOnLoad to disable plugin caching for this filter.
fsHasNoSetupDialog	Return from fsHasSetupDialog to disable setup button in Effect Controls panel
fsUnsupported	The selector is not recognized, or unsupported.