MOUSE command CLICK type

[Giancarlo]

Hello Cyrille,

Thank you very much for your comments. Now i better understand when to use one command than another.
I was writing a small program able to mimic the behaviour of the internal program showing the list of programs or list of note. Everything fine with the keys detection until i tried also to detect the click (to select one item of the list) and scrolls up and down to show the - hidden - part of the list scrolling it.
Are internal routines written in hppl or they were written in other language?

If Hppl how it was possible to manage the click event distinguished from the scroll? I know that CLICK and DRAG are different gestures, however it is not possible to detect which one was clicked and in case of DRAG in which direction?

Thanks

Giancarlo