How to show/hide a widget in document using ByteScout PDF SDK

The example demonstrates how to show/hide a widget in document using ByteScout PDF SDK.

Program.vb:
VB

'*******************************************************************
'       ByteScout PDF SDK
'                                                                   
'       Copyright © 2016 Bytescout, https://bytescout.com        
'       ALL RIGHTS RESERVED                                         
'                                                                   
'*******************************************************************

Imports Bytescout.PDF

''' <summary>
''' This example demonstrates how to show/hide a widget in document.
''' </summary>
Class Program

    Shared Sub Main()

        ' Create new document
        Dim pdfDocument = New Document()
        pdfDocument.RegistrationName = "demo"
		pdfDocument.RegistrationKey = "demo"
        ' Add page
        Dim page = New Page(PaperFormat.A4)
        pdfDocument.Pages.Add(page)

        ' Create widget that will be shown/hidden
        Dim editBox = New EditBox(20, 20, 100, 25, "editBox1")
        editBox.Text = "editBox1"
        page.Annotations.Add(editBox)

        ' Create button that will show the widget
        Dim buttonShow = New PushButton(20, 80, 50, 25, "buttonShow")
        buttonShow.Caption = "Show"
        page.Annotations.Add(buttonShow)
        ' Add Show action
        Dim showAction = New HideAction(False)
        showAction.Fields.Add(editBox)
        buttonShow.OnActivated = showAction

        ' Create button that will hide the widget
        Dim buttonHide = New PushButton(100, 80, 50, 25, "buttonHide")
        buttonHide.Caption = "Hide"
        page.Annotations.Add(buttonHide)
        ' Add Hide action
        Dim hideAction = New HideAction(True)
        hideAction.Fields.Add(editBox)
        buttonHide.OnActivated = hideAction

        ' Save document to file
        pdfDocument.Save("result.pdf")

        ' Cleanup 
		pdfDocument.Dispose()

        ' Open document in default PDF viewer app
        Process.Start("result.pdf")

    End Sub

End Class 

Program.cs:
C#

//*******************************************************************
//       ByteScout PDF SDK		                                     
//                                                                   
//       Copyright © 2016 ByteScout - https://bytescout.com       
//       ALL RIGHTS RESERVED                                         
//                                                                   
//*******************************************************************

using System.Diagnostics;
using Bytescout.PDF;

namespace ShowHideWidget
{
	/// <summary>
	/// This example demonstrates how to show/hide a widget in document.
	/// </summary>
	class Program
	{
		static void Main()
		{
			// Create new document
			Document pdfDocument = new Document();
			pdfDocument.RegistrationName = "demo";
			pdfDocument.RegistrationKey = "demo";
			// Add page
			Page page = new Page(PaperFormat.A4);
			pdfDocument.Pages.Add(page);

			// Create widget that will be shown/hidden
			EditBox editBox = new EditBox(20, 20, 100, 25, "editBox1");
			editBox.Text = "editBox1";
			page.Annotations.Add(editBox);
			
			// Create button that will show the widget
			PushButton buttonShow = new PushButton(20, 80, 50, 25, "buttonShow");
			buttonShow.Caption = "Show";
			page.Annotations.Add(buttonShow);
			// Add Show action
			HideAction showAction = new HideAction(false);
			showAction.Fields.Add(editBox);
			buttonShow.OnActivated = showAction;

			// Create button that will hide the widget
			PushButton buttonHide = new PushButton(100, 80, 50, 25, "buttonHide");
			buttonHide.Caption = "Hide";
			page.Annotations.Add(buttonHide);
			// Add Hide action
			HideAction hideAction = new HideAction(true);
			hideAction.Fields.Add(editBox);
			buttonHide.OnActivated = hideAction;

			// Save document to file
			pdfDocument.Save("result.pdf");

			// Cleanup 
			pdfDocument.Dispose();

			// Open document in default PDF viewer app
			Process.Start("result.pdf");
		}
	}
}