> Why on older versions of mame the touchscreen work and not in the current versions ? > What has changed ?
What do you mean by "work"? There has never been touchscreen code in the windows versions of MAME. Some games are controllable by mouse/lightgun, if you enable it. The touchscreen might be able to be used as a mouse or lightgun, but I don't believe we've ever had joystick games work with it.