Lpcwstr?

I’m trying to tie a MFC GIU into Networking API, the samples for the API (console applications) compiles fine after the conversion to Visual C++ 2005 outside of a couple of warnings, but when I create a MFC dialog box, I haven’t even created any buttons or added event handlers to what was generated by default, and start include the of the headers files with the stock trading classes I get all these errors “XXXX : cannot convert parameter 1 from ‘const char *’ or ‘const char [106]’ to ‘LPCWSTR’? What does this mean, I haven’t changed any of the networking api code that would compile in the samples?

Sounds like your new project has UNICODE defined. You can either undefine UNICODE, or learn how to use unicode in your application. I prefer the second way since it allows your application to work for more than one language.

How can I undefine unicode?

First of all, I suggest you start supporting unicode.

Second of all, if you're really bent on undefining Unicode this is how! Look in your project settings for a value called "Character set." There should be three options: "not set", "use unicode", "use multibyte." To switch to the ASCII character set (and effectively disable Unicode), set it to "not set"