public int ZoomPercent { get; set; }

Public Property ZoomPercent As Integer
	Get
	Set

// Set the zoom percent to a specific value
private void button13_Click(object sender, System.EventArgs e)
{
    this.ReportViewer1.ZoomMode = Telerik.ReportViewer.Silverlight.ZoomMode.Percent;
    this.ReportViewer1.ZoomPercent = 140;
}

' Set the zoom percent to a specific value
Private Sub button13_Click(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.ZoomMode = Telerik.ReportViewer.Silverlight.ZoomMode.Percent
    Me.ReportViewer1.ZoomPercent = 140
End Sub