how to change the look and feel for Qt form?

i ne开发者_StackOverflow中文版ed to change my form look and feel and i dont know : what i need to download and install ? is there any ready to use look and feel installed into qt library ? i am using windows and qt 4.4.3

Take a look at Widget Styles and Stylesheets (both linked to Qt 4.4 since that's your version).

Edit: In other words, you don't need to install anything else. Styles are built into Qt.

Look-and-feel is pretty vague -- you can change the GUI application style by adding the -style STYLENAME command line argument when you run the program. You can change to the application to run under motif, windows, platinum, or any other custom styles that you might have compiled (such as plastique).

Here is more information about it in the Qt Docs: http://doc.trolltech.com/4.6/qapplication.html#QApplication