I need to use mmio to take a SAFEARRAY of what is more or less a wave file at the moment that has been passed to me and filter it to make sure it''s a valid .wav file. I have an mmio function all set up for reading from a real .wav file, but I haven''t really used SAFEARRAY before now and would like to know what someone more knowledgeable would suggest regarding making a SAFEARRAY a buffer that mmio will be happy with. (SAFEARRAY, by the way, is the VARIANT array type, and in this context is an array of bytes naturally.) -fel