So I've been using the windows MessageBox api to test my code for bugs etc. Today, when I coded sumthing and tested it with some Messagebox functions, the code didn't act like I thought it would. The problem was, that when I called function from another source with messagebox api there, the code returned or something and the code which was under the function call didnt got executed. When i commented those messagebox functions in the source file, the code ran well without any problems. So i wanted to ask, is there something i dont know about messagebox function then, or why it acts like that?