Ok, so what I could notice:
1) Drag and drop function seems not working (i selected x,y for drag and x,y for drop) the function is not active (screen 1). May be I missed something or I am wrong in some way.
Very difficult to open action designer and to find attribute because right click has the same function than left click. Finally, I could get a little result with rise =>long touch, but I cannot control how long the touch is pressed...it's a pity (screen 2)
2) For C#, I tried to copy/past the code in custom code but i couldn't get any result. I don't need to specify (x,y) ?
Thks for your help,
Zerickx