Change Printer Document properties using API

I need to change printer documentproperties using the win32 api , this is what i got so far, but without exampls on how to use the api

http://www.activevb.de/rubriken/apik...roperties.html

can any1 help me on how i cloud change the document property with this api

thanks

There's an example here: http://support.microsoft.com/kb/167345 altjough it's in C you should be able to get the idea.