set_mouse_speed
status_t set_mouse_speed(const char* mouse_name, int32 speed);
if (set_mouse_speed(fTouchPad->Name(), value) == B_OK) {
set_mouse_speed(fTouchPad->Name(), fSettings.trackpad_speed);
set_mouse_speed(fTouchPad->Name(), fSettings.trackpad_speed);
if (set_mouse_speed(fName, speed) == B_OK)