You can have them both running easily enough.
Code:
Option Explicit
Sub ExclusiveCheckBoxes()
Dim strTemp As String
Dim oFF As FormField
Dim strGrpID As String
Dim strSeqID As String
Dim i As Long
Dim strSeqNext As String
strTemp = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" 'Permits up to 26 checkboxes per group
Set oFF = Selection.FormFields(1)
If oFF.CheckBox.Value = True Then
strGrpID = Left(oFF.Name, 8)
strSeqID = UCase(Right(oFF.Name, 1))
If strSeqID Like "[A-Z]" Then
'Clear all GroupID ChkBoxes including the CB selected (ensure only one CB in group is selected).
For i = 1 To Len(strTemp)
strSeqNext = strGrpID & "_" & Mid(strTemp, i, 1)
If ActiveDocument.Bookmarks.Exists(strSeqNext) Then
ActiveDocument.FormFields(strSeqNext).CheckBox.Value = False
End If
Next i
'Set the CB that was selected
oFF.CheckBox.Value = True
End If
End If
SetCheck
lbl_Exit:
Exit Sub
End Sub
Sub SetCheck()
Dim bChecked As Boolean
bChecked = False
With ActiveDocument
If .FormFields("CHK_1234_A").CheckBox.Value Then bChecked = True
If .FormFields("CHK_2345_A").CheckBox.Value Then bChecked = True
If Not .FormFields("Check1").CheckBox.Value Then
.FormFields("Check1").CheckBox.Value = bChecked
End If
End With
End Sub
You can avoid the need for code to set exclusivity if you use option form controls with a group setting. This is a different look to the box with an x in it though so perhaps you intentionally did it that way.