Article is dedicated to questions of the transference of the code in the applications in the language C/C++. Are examined the basic problematic questions, connected with the transference of the code to another platform, and also some most widely utilized methods and ways of increasing the transference, including by the way of using krossplatform software. Special attention is given to use in the applications of the krossplatform graphic interface. Is examined the possibility of designing ofgraphic interface with the aid of the krossplatform library GTK+ on Wednesday of the free programming QT of creator. Is examined the possibility of use an example of the creation of graphic interface with the aid of the krossplatform library GTK+ on Wednesday of the free programming QT of creator.