Visual Basic

Sub fill(ByVal tbcon As TabControl)
    Dim cnt As Control
    For Each cnt In tbcon.Controls
        If TypeOf cnt Is ComboBox Then
            Select Case CType(cnt, ComboBox).Tag
                Case 0
                    cnt.Items.Add("NP")
                    cnt.Items.Add("ND")
                    cnt.Items.Add("FP")
                    cnt.Items.Add("FD")
            End Select
        End If
    Next
End Sub

dim cmbcntrl as combobox
 Dim combos() As String = New String() {"NP", "ND", "FP", "FD"}
dim i as string
For i = 0 To 11
            cmbcntrl = cmbcntrl.Items.AddRange(combos)
next

 Dim combos() As String = New String() {"NP", "ND", "FP", "FD"}
   Dim i As Integer
dim cmbcntrl as combobox
 For i = 0 To 11
            cmbcntrl = cmbcntrl.Items.AddRange(combos)

Dim arr() As String = {"NP","ND","FP","FD",...}

For Each tabPage In TabControl1
  For Each control In TabPage
    If control Is ComboBox Then
      control.Items.AddRange(arr)
    End If
  Next
Next

Dim doc as new XML.XMLdocument
doc.Load("Filename")

For Each prozess as Xml.XmlNode in mainnode.Childnodes
...
Next