If successful, TRUE is returned, else FALSE is returned. Use BASS_ErrorGetCode to get the error code.
Error codes
BASS_ERROR_HANDLE
handle is not valid.
Remarks
If there are streams created by a plugin in existence when it is being freed, those streams will automatically be freed too. Samples loaded by the plugin are unaffected as the plugin has nothing to do with them once they are loaded; the sample data is already fully decoded.