tri combobox à partir de feuilles sous condition

Private Sub UserForm_Initialize()
  Dim temp()
  k = 1
  For Each sh In ActiveWorkbook.Sheets
   If sh.Cells(1, 8) = "VERSION" Then
     ReDim Preserve temp(1 To k)
     temp(k) = sh.Name
     k = k + 1
    End If
  Next sh
  Call Tri(temp, LBound(temp), UBound(temp))
  Me.ComboBox1.List = temp
  Me.ComboBox1.ListIndex = 0
End Sub

Sub Tri(a, gauc, droi)          ' Quick sort
 ref = a((gauc + droi) \ 2)
 g = gauc: d = droi
 Do
     Do While a(g) < ref: g = g + 1: Loop
     Do While ref < a(d): d = d - 1: Loop
     If g <= d Then
       temp = a(g): a(g) = a(d): a(d) = temp
       g = g + 1: d = d - 1
     End If
 Loop While g <= d
 If g < droi Then Call Tri(a, g, droi)
 If gauc < d Then Call Tri(a, gauc, d)
End Sub