dia functions in Windows have been documented from the 
standpoint that there are no predefined multimedia types, compressors or
decompressors. That may be useful to someone, maybe a driver writer, as the
system is generic, and allows different implementations to be plugged in.
But it isn't so helpful to anyone who just wants to write some code which 
uses the API, since there are no functional examples in the documentation
which you can use.  This is very irritating.  I would suggest as a minimum
that ther