Actually I was about to post and ask a question how I could be done. Then I was able to solve the problem myself. Here is the result, just in case someone runs into the same problem and is looking for a solution.
tinyXML doesn't have a "getText" method. If you need to print the content "blablabla" (and not the tagname) out of a construct like the following in order to use it with <addMessageBox> or <addStaticText>
<planets>
<venus>blablablabla</venus>
</planets>
here is something that works (at least it does work for me):
stringw topic = L"Solarsystem";
TiXmlDocument doc("../tut_media/xml/solsys.xml");
TiXmlHandle handle(&doc);
TiXmlText* text = handle.ChildElement("planets", 0).ChildElement("venus", 0).FirstChild().Text();
if(text)
{
const char* message = text->Value();
stringw msg(message);
msg.c_str();
device->getGUIEnvironment()->addMessageBox(topic.c_str(), msg.c_str());
}
maybe someone finds this useful
wolfsb, berlin, Germany