>>>>>Hi to all,
>>>>>
>>>>>I want to give to my forms a more user friendly interface, I want to enabled my forms to change position to controls when the user is left-handed, because I think that with a left-handed mouse it's more difficult to click on some position than with a right-handed mouse. So how can I know if the user have setted in control panel the left-handed mouse ?
>>>>>

>
>I think that was exactly Paul's point. Instead of referring to them as left and right mouse buttons, let's call them the primary and secondary mouse buttons (primary is left for righties, etc.). In that case if your application is checking for PrimaryButtonDown it won't matter if a rightie pushed the left button or a leftie pushed the right button the application will be notified correctly. This means there is no reason for an application to query regarding the swapped nature of the mouse buttons unless the purpose of the app is to swap the buttons.
>Just my 2 cents.

Thanks George for your reply with the solution of my problem.

To Dore:
I don't want to know if mouse button are swapped for something about click event, but I've to know if the user is using the left hand, this because I think that it can be nice to move in the form the controls like button where it can be easy to point the arrow, it is a discussiona about HCI

Renato