In Unix, is there any way in which I can create a GUI like Realplayer? I mean the Windows Look & Feel.

Borded with buttons, windows, dialogs and other predefined widgets, I am wondering how to create my own buttons that come in different shapes and fashions or even draw images/control objects the way I like.

But I don't have much knowledge about how a GUI is built and displayed, can anyone give me some suggestion on what I should start with?

Thanks and Happy New Year!