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Existing Qt applications should require no porting provided there is no platform dependent code.
| Platform Dependent Code | 
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| Platform dependent code includes system calls, calls to the underlying window system (Windows or X11), and Qt platform specific methods such as QApplication::x11EventFilter(). For cases where it is necessary to use platform dependent code there are macros defined that can be used to enable and disable code for each platform using #ifdef directives: | 
| Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies) | Trademarks | Qt 4.6.3 |