I'm sorry, i think you don't understand yet my question yesterday. So i think have to tell you more spesific about my case.
I try make aplication which one computer can use two mice (maybe more). This aplication help me to handle problem absentee in my workplace.
Usually we have 2 button from one mouse right clik and left clik. So if i add one more mouse the computer have 2 buttons more (4 buttons) with one cursor.
The problem is how to identify which mouse (left or right) is active when one mouse used.
How the "Form" can identity which mouse is used ? maybe the "Form" can show display which can tell
"right clik first mouse" or "left clik first mouse"or "right clik second mouse" or "left clik second mouse". So i know which mouse active without see mouse in my hand.