Excel VBA Userform CheckBox check mark does not appear - vba

Question

I have created an UserForm in Excel. The UserForm has a ListBox and a CheckBox added to it.
I have written VBA code to populate the ListBox with data in the 1st column of the UserForm_Data worksheet. I am attempting to add a Select All CheckBox to the UserForm. When I click on the CheckBox once, the check mark does not appear but the If Me.CheckBox.Value = True section of the Checkbox1_Change event is executed and all the items in the ListBox are selected. The check mark appears only when I click the CheckBox the second time. The Excel VBA code and an image of the UserForm are attached.
Option Explicit
Private Sub ListBox1_Change()
Dim i As Long
If CheckBox1.Value = True Then
For i = 0 To Me.ListBox1.ListCount - 1
If Me.ListBox1.Selected(i) = False Then
Me.CheckBox1.Value = False
End If
Next i
End If
End Sub
Private Sub CheckBox1_Change()
Dim i As Long
If Me.CheckBox1.Value = True Then
With Me.ListBox1
For i = 0 To .ListCount - 1
.Selected(i) = True
Next i
End With
Else
i = 0
End If
End Sub
Private Sub UserForm_Initialize()
Dim rng1 As Range
Dim ws1 As Worksheet
Dim i, lastRow As Long
Dim list1 As Object
Dim string1 As String
Dim array1 As Variant
Set list1 = CreateObject("System.Collections.ArrayList")
Set ws1 = ThisWorkbook.Worksheets("UserForm_data")
lastRow = ws1.UsedRange.Rows.Count
Me.ListBox1.Clear
For i = 2 To lastRow
string1 = CStr(ws1.Cells(i, 1).Value)
If Not list1.Contains(string1) Then
list1.Add string1
End If
Next i
array1 = list1.ToArray
Me.Caption = "UserForm1"
Me.ListBox1.list = array1
Me.ListBox1.MultiSelect = 1
Me.CheckBox1.Value = False
End Sub

Answer 1

There are two steps you can take to address this:
There's a chance that simply adding a DoEvents at the end of the CheckBox1_Change event will force the redraw.
If that doesn't work, add the following line just above the DoEvents and test it again... this encourages a screen update...
Application.WindowState = Application.WindowState

Answer 2

One approach is to use global flags to toggle on and off the control event handlers. Here is what the updated events would look like:
Option Explicit
Private Sub ListBox1_Change()
Dim i As Long
If Not AllowListBoxEvents Then Exit Sub
AllowCheckBoxEvents = False
If CheckBox1.Value = True Then
For i = 0 To ListBox1.ListCount - 1
If ListBox1.Selected(i) = False Then CheckBox1.Value = False
Next i
End If
AllowCheckBoxEvents = True
End Sub
Private Sub CheckBox1_Change()
Dim i As Long
If Not AllowCheckBoxEvents Then Exit Sub
AllowListBoxEvents = False
If CheckBox1.Value = True Then
For i = 0 To ListBox1.ListCount - 1
ListBox1.Selected(i) = True
Next i
End If
AllowListBoxEvents = True
End Sub
Make sure you set the "Allow" variables to True in the Initialize event.