Writing front end gui for commandline application

Can anyone please, point out some good tutorials, to develop a front end gui for commandline applications ? I mean writing a front end for applications like ffmpeg,nmap etc. I know that there exists many for these applications but I really need to know how to do it?. I'm planning to develop gui for some c++ applications? . What would be the better methods for do开发者_JS百科ing it and what libraries for gui development should be used to ensure cross-platform functionality ? Any help would be greatly appreciated..

Thanks in advance..

Wrapping command line applications usually means executing the command line application, handling their command line parameters, and parsing their output.

For a GUI toolkit I would suggest going for one of the major cross platform toolkits:

• Qt (C++)
• GTK+ (C, has C++ wrapper called gtkmm)
• wxWidgets (C++)