Thanks guys,

I think what "evildictator" said about DbgHelp.dll and GetSymbolName from Context.Esp seems  what I need. Now, if any of you could only help me with an actual sample it would be a dream for me! I am in real trouble because my vacation time is so short.

Of couse, I stand by this, whoever delivers it first: http://channel9.msdn.com/Forums/Coffeehouse/100-bounty-for-code-serious-offer