Visual Basic

for u = 0 to datatable.rows.count - 1
    ' process code
next

for each rows in datatable.rows
     ' process code
next

Public Function GetCfgOption(ByVal strSetting As String, ByVal intSelectedIndex As Integer, ByVal strDataType As String, Optional ByVal intOptIndex As Integer = 0) As String

    Dim xmlSettings As New Xml.XmlDocument
    xmlSettings.Load("SrcBench.xml")

    Dim nodeSetting As Xml.XmlNode
    nodeSetting = xmlSettings.SelectSingleNode("/CONTENT/Settings/" & strSetting & "[Index='" & intSelectedIndex & "']")

    Dim nodeOption As Xml.XmlNode
    nodeOption = nodeSetting.SelectSingleNode("/CONTENT/Settings/" & strSetting & "/Setting[@Index='" & intOptIndex & "']")

    Select Case strDataType
        Case "Key"
            Return nodeOption.ChildNodes.Item(0).InnerText
        Case "Value"
            Return nodeOption.ChildNodes.Item(1).InnerText
    End Select

    Return Nothing
End Function

GetCfgOption("FilterMode", intFilterModeIndex, "Key"<, 0>) 'intFilterModeIndex would be a variable and can = 0-5; the ", 0" at the end is assumed
GetCfgOption("FilterMode", intFilterModeIndex, "Value"<, 0>)
GetCfgOption("FilterMode", intFilterModeIndex, "Key", 1) 'explicitly including 1 would get the 2nd set of key/value, 2 the 3rd, and so on
GetCfgOption("FilterMode", intFilterModeIndex, "Value", 1)

<?xml version="1.0" encoding="UTF-8"?>
<CONTENT>

<Settings>
  <FilterMode>
    <Index>0</Index>
    <Option>Bilinear</Option>
    <Setting Index="0">
      <Key>mat_forceaniso</Key>
      <Value>0</Value>
    </Setting>
    <Setting Index="1">
      <Key>mat_trilinear</Key>
      <Value>0</Value>
    </Setting>
  </FilterMode>
  <FilterMode>
    <Index>1</Index>
    <Option>Trilinear</Option>
    <Setting Index="0">
      <Key>mat_forceaniso</Key>
      <Value>1</Value>
    </Setting>
    <Setting Index="1">
      <Key>mat_trilinear</Key>
      <Value>1</Value>
    </Setting>
  </FilterMode>
  <FilterMode>
    <Index>2</Index>
    <Option>2x Anisotropic</Option>
    <Setting Index="0">
      <Key>mat_forceaniso</Key>
      <Value>2</Value>
    </Setting>
    <Setting Index="1">
      <Key>mat_trilinear</Key>
      <Value>0</Value>
    </Setting>
  </FilterMode>
  <FilterMode>
    <Index>3</Index>
    <Option>4x Anisotropic</Option>
    <Setting Index="0">
      <Key>mat_forceaniso</Key>
      <Value>4</Value>
    </Setting>
    <Setting Index="1">
      <Key>mat_trilinear</Key>
      <Value>0</Value>
    </Setting>
  </FilterMode>
  <FilterMode>
    <Index>4</Index>
    <Option>8x Anisotropic</Option>
    <Setting Index="0">
      <Key>mat_forceaniso</Key>
      <Value>8</Value>
    </Setting>
    <Setting Index="1">
      <Key>mat_trilinear</Key>
      <Value>0</Value>
    </Setting>
  </FilterMode>
  <FilterMode>
    <Index>5</Index>
    <Option>16x Anisotropic</Option>
    <Setting Index="0">
      <Key>mat_forceaniso</Key>
      <Value>16</Value>
    </Setting>
    <Setting Index="1">
      <Key>mat_trilinear</Key>
      <Value>0</Value>
    </Setting>
  </FilterMode>
  </Settings>

</CONTENT>