
Years years ago, I decided to learn MCF/Win32 API or not to learn GUI programming.
I decide not.
Than learned wxWidgets. It's cross compilable C++ API that works on Windows, Linux, MacOS and others. It run at full speed. No slowness and no require for VM like java - .net...
I made DivFix++, wxHexEditor, Meteorite with it.
wxWidgets has support on python, perl and java too.
You could needed to check this page up. wxWiki
If I were you learned wxPython.

My GTK doesn't show that. M?ght be a problem depending theme that I use? Will be investigated later
