This solution requires you to add a second ListBox element and place it above the first one.
Like this:
Then you call the function CreateListBoxHeader to make the alignment correct and add header items.
Result:
Public Sub CreateListBoxHeader(body As MSForms.ListBox, header As MSForms.ListBox, arrHeaders)
' make column count match
header.ColumnCount = body.ColumnCount
header.ColumnWidths = body.ColumnWidths
' add header elements
header.Clear
header.AddItem
Dim i As Integer
For i = 0 To UBound(arrHeaders)
header.List(0, i) = arrHeaders(i)
Next i
' make it pretty
body.ZOrder (1)
header.ZOrder (0)
header.SpecialEffect = fmSpecialEffectFlat
header.BackColor = RGB(200, 200, 200)
header.Height = 10
' align header to body (should be done last!)
header.Width = body.Width
header.Left = body.Left
header.Top = body.Top - (header.Height - 1)
End Sub
Private Sub UserForm_Activate()
Call CreateListBoxHeader(Me.listBox_Body, Me.listBox_Header, Array("Header 1", "Header 2"))
End Sub