i would like to start a macro ( let's say macro 1) to start if the user
click on the mouse.
It must be wherever they are in the sheet.
just a click and macro 1 starts.

Can it be done ?

And how to do it if I want a double click ?

Thanks

Luc

There's a "Before Right Click" and a "Before Double Click" on the sheet
events.
Don't know if that'll help.
For a single click, John Walkenback shows a way to do that on his web
site.

John

You have DoubleClick and RightClick events. To see how these events
function: open your workbook, press Alt+F11, double click on ThisWorkbook
object and insert the code below:

Private Sub Workbook_SheetBeforeDoubleClick(ByVal Sh As Object, ByVal Target
As Range, Cancel As Boolean)
   Cancel = True
   MsgBox "You double-clicked. Cal your procedure (macro) here"
End Sub

Private Sub Workbook_SheetBeforeRightClick(ByVal Sh As Object, ByVal Target
As Range, Cancel As Boolean)
   Cancel = True
   MsgBox "You right-clicked. Cal your procedur(macro) here"
End Sub

HTH