>If it's a COM DLL, use the OLE/COM Viewer. Use the View Typelib option from the File menu. The typelib can be kind of tricky to read, but it not only gives you the function names, it gives you the parameters and datatypes as well.
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>You could also use the Typelib Information DLL, but it's a bit more work. Randy Brown's MSMQ article has an example of how to use this (http://msdn.microsoft.com/library/default.asp?URL=/library/techart/msmqwvfp6.htm). You have to do some coding, but once you're done, you'll have a handy utility you can use again.

A lot of third-party DLLs (especially printing) are not COM DLLs but function libraries. The OLE Viewer and TLBINF32.DLL won't work on these.

The only other problem (although not really a problem) with these types of utilities is they are geared towards C++ developers and not necessarily VFP. Properties are described as methods. If the property is read-only, there is one method for it (Get); if the property is read-write there are two methods (Get, Put). While not hard to understand, it is different than what some VFPers are to.