vba cell event change & call macro combination

I need to run a macro that will unhide certain hidden columns when the active cell is no longer the active cell (users will click out of the active cell to deactivate it).

I think I have found snippets of code for the 3 events:

(a) unhide columns

Code:

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Columns("A:G") .EntireColumn.Hidden = False

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I've called this macro ShowConsole

(b) active cell not active cell

Code:

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If ActiveCell.Address<>"$M$16" Then

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and

(c) event change

Code:

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Private Sub Worksheet_Change(ByVal Target As Range)
If Not Intersect(Target, Me.Range("M16")) Is Nothing Then
Application.EnableEvents = False
Call ShowConsole
Application.EnableEvents = True
End If
End Sub

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My problem is that I don't know how to bring all of this together.

If you want code that will hide columns A:G when M13 is selected and unhide them when it is de-selected. Code like this in the sheet's code module should work.

Code:

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Private Sub Worksheet_SelectionChange(ByVal Target As Range)
    Me.Range("A:G").EntireColumn.Hidden = (Target.Address = "$M$16")
End Sub

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Thank you