Cancel macro 1 if macro 2 is running - excel

Question

I have two macros altogether, one macro assigned to my Private Worksheet_Change event and the other assigned to my Private Worksheet_SelectionChange event like so:
Macro 1
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
'If Hours Column Selected
If Not Intersect(Target, Range("Z" & ActiveCell.Row)) Is Nothing And Range("Z" & ActiveCell.Row).Value <> "" Then
NewValue = Application.InputBox("Please Enter Your Delegated Reference:")
If NewValue <> vbNullString Then
Dim rw2 As Long, cell2 As Range
rw2 = ActiveCell.Row
With Worksheets("Data").Columns("I:I")
Set cell2 = .find(What:=NewValue, LookIn:=xlFormulas, _
LookAt:=xlWhole, MatchCase:=False, SearchFormat:=False)
If Not cell2 Is Nothing Then
Application.DisplayAlerts = False
cell2.Offset(0, 4).Value = Sheet1.Range("Y" & ActiveCell.Row).Value
cell2.Offset(0, 5).Value = Sheet1.Range("H" & ActiveCell.Row).Value
cell2.Offset(0, 6).Value = Sheet1.Range("I" & ActiveCell.Row).Value
MsgBox "Found"
Sheet1.Range("Y" & ActiveCell.Row).Value = cell2.Offset(0, 1).Value
Sheet1.Range("H" & ActiveCell.Row).Value = cell2.Offset(0, 2).Value
Sheet1.Range("I" & ActiveCell.Row).Value = cell2.Offset(0, 3).Value
Application.DisplayAlerts = True
Else
MsgBox "Not Found"
Sheet1.Range("A5").Select
End If
End With
Else
If NewValue = vbNullString Then
MsgBox "Not Found"
Sheet1.Range("A5").Select
End If
End If
End If
End Sub
Macro 2
Private Sub Worksheet_Change(ByVal Target As Range)
If Not Intersect(Target, Range("Y" & ActiveCell.Row)) Is Nothing Then
myValue3 = MsgBox("This is a message")
End If
End Sub
The problem I have is when I click on my active cell row in column Z I am running macro 1 and asking it to update the value of my active cell row in column Y. However when the information in column Y is updated, it is causing macro 2 to run where I get a msgbox displaying and I don't want this to happen.
Whilst I still require macro 2 and do want the msgbox to display, I only want it to display when I click on the cell in column Y. So in other words, I want to be able to cancel out macro 2 if macro 1 is running.
I have tried using application.displayevents = false in macro 1 but this doesn't work.
Please can someone show me the best way to do this?

Answer 1

you can use
Application.EnableEvents = False
.. at the start of your macro1 to disable events and
Application.EnableEvents = True
To turn it back on again at the end of macro1.

Answer 2

Please try the following:
[1] Add a new Module to your VBA Project, with the following:
Public EventRunning as Boolean
[2] Modify your Worksheet_SelectionChange macro as follows:
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
EventRunning=True
...
EventRunning=False
End Sub
[3] Modify your Worksheet_Change as follows:
Private Sub Worksheet_Change(ByVal Target As Range)
If EventRunning Then Exit Sub
...
Best wishes Ben