How to redefinition QT function?

[TomNow99]

Hello,

I know that is strange, but I would like to learn how to redefinition ( or add new ) function of another QT class.

For example class QScreen and function grabWindow(WId window, int x = 0, int y = 0, int width = -1, int height = -1). I would like to write new my grabWindow(WId window, int x = 0, int y = 0, int width = -1, int height = -1) or create grabWindow2(WId window, int x = 0, int y = 0, int width = -1, int height = -1).

How I should that?

[Bonnie]

In C++ you can't redefinition or add new function to any class defined in the libraries.
You can only subclass it.