>>I have found some further information on the DLL files regarding constant definitions. There are two C header files which contain all the constants used by the DLLs which I have merged into one file. The help system that came with the DLLs tells you where to get these but if anybody wants just the constants, I can eMail these to you.
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>I, for one, would love to get this information from you. But you might be better served by providing a ZIP file for posting in the files section here. Many thanks for all your efforts on this.

Mark,
I am just about to post this info in the files section (Win32API) as suggested. The description will tell all about it. I had thought of it before but wasn't sure whether to or not.