Public Sub SwapColumns( _
   ByVal fromColumn As Integer, _
   ByVal toColumn As Integer, _
   ByVal count As Integer _
) 

Dim instance As DefaultSheetSpanModel
Dim fromColumn As Integer
Dim toColumn As Integer
Dim count As Integer
 
instance.SwapColumns(fromColumn, toColumn, count)

public void SwapColumns( 
   int fromColumn,
   int toColumn,
   int count
)

private void Page_Load(object sender,System.EventArgs e)
{
if(this.IsPostBack)return;

FpSpread1.ActiveSheetView.ColumnCount=10;
FpSpread1.ActiveSheetView.RowCount=10;
FarPoint.Web.Spread.Model.DefaultSheetSpanModel model=(FarPoint.Web.Spread.Model.DefaultSheetSpanModel)FpSpread1.ActiveSheetView.SpanModel;
model.Add(0,0,4,1);
model.Add(0,2,2,1);
}

private void Button1_Click(object sender,System.EventArgs e)
{
FarPoint.Web.Spread.Model.DefaultSheetSpanModel model=(FarPoint.Web.Spread.Model.DefaultSheetSpanModel)FpSpread1.ActiveSheetView.SpanModel;
model.SwapColumns(0,1,1);
}

Private Sub Page_Load(ByVal sender As System.Object,ByVal e As System.EventArgs)Handles MyBase.Load
If(IsPostBack)Then Return

FpSpread1.ActiveSheetView.ColumnCount=10
FpSpread1.ActiveSheetView.RowCount=10
Dim model As FarPoint.Web.Spread.Model.DefaultSheetSpanModel=FpSpread1.ActiveSheetView.SpanModel
model.Add(0,0,4,1)
model.Add(0,2,2,1)
End Sub

Private Sub Button1_Click(ByVal sender As System.Object,ByVal e As System.EventArgs)Handles Button1.Click
Dim model As FarPoint.Web.Spread.Model.DefaultSheetSpanModel=FpSpread1.ActiveSheetView.SpanModel
model.SwapColumns(0,1,1)
End Sub