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# Porting Guides

A number of guides and documents are available that cover porting issues, from detailed coverage of API differences between Qt 3 and Qt 4 to platform and tool-specific documentation.

Moving from Qt 3 to Qt 4 | Porting advice for authors of new and existing Qt 3 applications.
Porting .ui Files to Qt 4 |
Porting Qt Applications to Qtopia Core |
Porting to Graphics View | Hints and tips to assist with porting canvas applications to the Graphics View framework.
Porting to Qt 4 |
Porting to Qt 4 (Drag and Drop) | An overview of the porting process for applications that use drag and drop.
qt3to4 - The Qt 3 to 4 Porting Tool |