Setting wallpaper on windows

[ihoss]

Well, it works in its own little cpp file, but when I try to include it in the QT project, it won't work. I have tried to rearrange the includes, but it has no effects. I've also set the namespace to std, but it does not seem to be required to make the little cpp compile.

edit: There is one strange thing though. In the little cpp i have to use CHAR as the 5th argument in the FormatMessage function, but in the "qt" program i have to use WCHAR. That is kinda strange when I include the same files and compile it with the same compiler.