HelenOS sources
display_window_set_caption 70 uspace/lib/display/include/display.h extern errno_t display_window_set_caption(display_window_t *, const char *);
display_window_set_caption 1460 uspace/lib/display/test/display.c rc = display_window_set_caption(wnd, caption);
display_window_set_caption 1516 uspace/lib/display/test/display.c rc = display_window_set_caption(wnd, caption);
display_window_set_caption 825 uspace/lib/ui/src/window.c rc = display_window_set_caption(window->dwindow, caption);
HelenOS homepage, sources at GitHub