列の最大幅と最小幅を設定

<ig:XamGrid x:Name="MyGrid" AutoGenerateColumns="False">
   <ig:XamGrid.ColumnResizingSettings>
      <ig:ColumnResizingSettings AllowColumnResizing="Indicator" AllowCellAreaResizing="True" AllowMultipleColumnResize="True" AllowDoubleClickToSize="True"/>
   </ig:XamGrid.ColumnResizingSettings>
   <ig:XamGrid.Columns>
      <ig:TextColumn Key="ProductID"/>
      <ig:TextColumn Key="ProductName" IsResizable="/>
      <ig:TextColumn Key="QuantityPerUnit" MinimumWidth="10" MaximumWidth="175" />
      ...
   </ig:XamGrid.Columns>
</ig:XamGrid>

Imports Infragistics.Controls.Grids
...
Dim ColumnWidth As Column = Me.MyGrid.Columns.DataColumns("QuantityPerUnit")
ColumnWidth.MaximumWidth = 175
ColumnWidth.MinimumWidth = 10

using Infragistics.Controls.Grids;
...
Column ColumnWidth = this.MyGrid.Columns.DataColumns["QuantityPerUnit"];
ColumnWidth.MaximumWidth = 175;
ColumnWidth.MinimumWidth = 10;