method for executing additional process linked main process

This invention relates to a method for running any additional process in conjunction with the main processing that is executed in full-screen mode (full screen mode) or the mode window (window mode), such as online games. Executing main processing associated additional process method according to the invention, and the execution means adding process executed is inserted in the main processor, a first step of generating a child window of the main processing, the sub-process execution means is a sub for the main processing a second step and, the addition process executing means for classed and a third step to run the additional program in the child window, the additional image displayed on the child windows.