Hi! > > I must issue a system call from my program, something like > > > > system ("prog"); > > > > This operation takes at least a minute, but the time of computation > > actually depends on many parameters. > > > > 1) How do I keep refreshing the GUI? > > Use g_spawn_async* family of functions instead, and use pipes to > communicate with and track the child process if you need to. Thanks! But ... I learned how to use g_spawn_async, I programmed everything and then, when I tried compiling it, I realized that these functions are declared only in glib2*. Unfortunately, I'm using Gtk1.2 because I need to be compatible with as many computers as possible. Do I have any alternatives to g_spawn_async* in 1.2? Thanks, Andrej