''' <summary>
''' Cancels rendering of PDF page when progress of rendering is greater than 80%.
''' </summary>
''' <param name="page">The page of PDF document.</param>
Public Shared Sub CancelRenderingExample(page As Vintasoft.Imaging.Pdf.Tree.PdfPage)
    ' render image of PDF page
    page.Render(New System.EventHandler(Of Vintasoft.Imaging.ProgressEventArgs)(AddressOf RenderingProgress))
End Sub

''' <summary>
''' Event handler of rendering progress.
''' </summary>
Public Shared Sub RenderingProgress(sender As Object, e As Vintasoft.Imaging.ProgressEventArgs)
    ' if rendering canbe canceled and rendering progress is geater than 80%
    If e.CanCancel AndAlso e.Progress >= 80 Then
        ' cancel rendering
        e.Cancel = True
    End If
End Sub

/// <summary>
/// Cancels rendering of PDF page when progress of rendering is greater than 80%.
/// </summary>
/// <param name="page">The page of PDF document.</param>
public static void CancelRenderingExample(Vintasoft.Imaging.Pdf.Tree.PdfPage page)
{
    // render image of PDF page
    page.Render(new System.EventHandler<Vintasoft.Imaging.ProgressEventArgs>(RenderingProgress));
}

/// <summary>
/// Event handler of rendering progress.
/// </summary>
public static void RenderingProgress(object sender, Vintasoft.Imaging.ProgressEventArgs e)
{
    // if rendering canbe canceled and rendering progress is geater than 80%
    if (e.CanCancel && e.Progress >= 80)
        // cancel rendering
        e.Cancel = true;
}