Good afternoon Thw

A cell cannot kick off a macro, but you could use an event procedure to
do something when the cell changes - paste this code into your worksheet
event pane and replace my msgbox with your code. And remember that my
code is checking for the value of cell A1 being false - your post
doesn't state which cell you want to watch.

Private Sub Worksheet_Calculate()
If Range("A1") = True Then
MsgBox "Cell A1 is true."
End If
End Sub

HTH

DominicB


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