Hello, On Jan 14, 2009, at 2:26 PM, Sergey wrote: > I need to create trialware system for my QT program on Mac OS. Since you are working on MacOS, you might want to have a look at http://www.aquaticmac.com/ which provides a Cocoa framework that can easily be used within a Qt program by mixing C++ and Objective-C. Regards, Ju.