Q:

VBA click a cell and action, extremely simple but not for me

H! 
I am new to VBA.
This maybe a too simple of a question, but I am struggling to use VBA:
when a cell(1,1) is clicked as it has 1, the msgbox would show up saying "hi"
Sub test()

'click action 'when cell(1,1) is clicked and if cells(1,1) is 1, msgbox saying "hi" will show up, if not nothing If Cells(1, 1) = 1 Then
    MsgBox "hi"
    Else 
End If
End Sub

A:

This code belongs in the worksheet module.
Right click on the sheet tab and select "View Code"
Paste this code there:
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
    If Target.Address = "$A$1" Then
        If Target = 1 Then
            MsgBox "hi"
        End If
    End If
End Sub

