I can't "include" library

[Elena Andueza]

(Sorry for my English, I'm Spanish.) I'm Elena. I want to use the API to read from XML documents and use these data in other normal functions (whit normal data types) and I also want to use the API to write normal data types (normal Strings, normal integers...) in XML documents. I'm following the instructions written in "Programming" in this web page. I put (in Visual c++) " #include <xercesc/dom/DOM.hpp>" and it doesn't run. I have had to change all the headers of all files included like this " #include ".\xercesc\dom\DOM.hpp" " and like this, I have been able to compile OK. But now I think I have included succesfully the API I put the follow declaration: DOMDocument* myDocument; DOMNode* aNode; DOMText* someText;  and it doesn't understand what i'm telling him (him=the computer). And now I don't have idea what can I do and what can be the problem.   Could anybody help me?   Thank you