Hi Renato.

My registry for Win98 contains a key:
HKEY_CURRENT_USER\Control Panel\Mouse

IF SwapMouseButtons = "0", Buttons are NOT switched.
IF SwapMouseButtons = "1", Buttons are switched.

Not sure if this is standard for all versions of windows.

HTH
Michael M. Emmons

>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 ?
>
>TIA