I've been asked to create an app that may be sold for a profit. It's kind of an experiment, and I'm not sure if it will really take off. I'd like to not have to shell out a lot of dough for some development tools. What are the restrictions on software compiled with mingw? D they fall under the GPL? The way I understand it, only software that includes other software under GPL must be distributed under GPL. Does this happen woth mingw (this is what I don't understand) if I #include windows.h, what is being compiled into my exe? Studd that is already part of windows, or something that is distributed with mingw under GPL?