Public ReadOnly Property ColumnCount As Integer

Dim instance As SheetSpanModelEventArgs
Dim value As Integer
 
value = instance.ColumnCount

public int ColumnCount {get;}

FarPoint.Win.Spread.Model.BaseSheetSpanModel model;

model = (FarPoint.Win.Spread.Model.BaseSheetSpanModel)fpSpread1.ActiveSheet.Models.Span;
model.AddSelection(0, 0, 2, 2);

model.Changed += new FarPoint.Win.Spread.Model.SheetSpanModelEventHandler(model_SpanModelChanged);
    
private void button1_Click(object sender, System.EventArgs e)
{
    model.Add(4, 2, 2, 3);
}

private void model_SpanModelChanged(object sender, FarPoint.Win.Spread.Model.SheetSpanModelEventArgs e)
{
    textBox1.Text = e.ColumnCount.ToString();
}

Friend WithEvents model As FarPoint.Win.Spread.Model.BaseSheetSpanModel

model = FpSpread1.ActiveSheet.Models.Span
model.Add(0, 0, 2, 2)

Dim h As FarPoint.Win.Spread.Model.SheetSpanModelEventHandler = AddressOf model_SpanModelChanged
AddHandler model.Changed, h

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    model.Add(4, 2, 2, 3)
End Sub

Private Sub model_SpanModelChanged(ByVal sender As Object, ByVal e As FarPoint.Win.Spread.Model.SheetSpanModelEventArgs)
    TextBox1.Text = e.ColumnCount.ToString()
End Sub