>Where do I find the values for the Messages ie. CB_FINDSTRING is H14C but I need to know what CB_SHOWDROPDOWN is, as well as some others?

Chad,
One of the tools that you can install as part of Visual Studio 6 is the API Text Viewer. You can find most of the WinAPI functions and constants there.

Also, if you have VC++, you can look through the .H files. You might also try searching msdn.microsoft.com.