I have som problem with XML DOM Parse: I used <xmlengdom.h> library. When i create project in consol is verry good and i was parsed my *.xml file and display the same tree on consol project. But when i using this library on GUI Application is wrong. I was included <xmlengdom.h> in my project, but whent i buld project is error occur. This is message error: "Undefined symbol: 'RXmlEngDOMParser::RXmlEngDOMParser(void) (??0RXmlEngDOMParser@@QAE@XZ)'". In Carbide.c++ wheht i using this library is successfull and i can use class, function in this library. But went i buil or run then error occur. System can't understan some class in this library. EX(RXmlEngDOMParser, RXmlEngDocument....). Please help me.