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Home » VB.NET » Display and Hiding SIP on Pocket PC

Display and Hiding SIP on Pocket PC


When you get your hands on a Pocket PC for the first time you have to wonder just how the heck do you enter information?

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When you get your hands on a Pocket PC for the first time you have to wonder just how the heck do you enter information? Well as you will see in this article Pocket PC has something called a SIP or Soft Input Panel? The idea is you click a button at the bottom of the screen and up pops a miniature QWERTY keyboard which when used enters information into an active control like a textbox.

Now this is useful but how to use it from a C# project? If I was programming in Embedded Visual Basic 3.0 or eVB I could set a property called sipvisible to true and magically the SIP would appear on screen. Currently on the compact framework nothing similar exists so we have to call into our friends the WIN32 set and specifically call SipShowIM from coredll.

As you can see from this code its pretty straightforward to do this and results in a simple program that allows us to display the SIP and enter text into the text box.

Here is what the application runs like on my Pocket PC emulator.



At this point I have pressed the Show SIP button and clicked into the textbox and then am able to click on letters in the SIP keyboard to enter data. Of course pressing the Hide SIP button hides the SIP again.

In previous articles I stressed not to use the Pocket PC emulator for testing your code all the time but of course this is exactly what I am doing now. I did say however that with each release of the Pocket PC development tools the emulator gets better.

So just for fun I launched the Pocket Internet Explorer and of course with a few clicks I was reading
www.c-sharpcorner.com on a Pocket PC emulators Pocket Internet Explorer! Here is the screenshot in case you think I am lying.



So as if C#.NET was not cool enough, now you have a new platform to run it on in the form of Pocket PC and all its derivatives. Of course as we are still in beta of the compact framework things will change over the next few releases but it is looking very impressive and of course I am not having to learn anything new over what I have learnt on the full .NET to create mobile applications.

'PocketPCSIPView.cs
'Shows how to hide and display the SIP on a Pocket PC
'Written June 4th by John O'Donnell - csharpconsulting@hotmail.com
Imports System
Imports System.Windows.Forms
Imports System.Runtime.InteropServices
Public Class Form1
Inherits System.Windows.Forms.Form
Private button1 As System.Windows.Forms.Button
Private button2 As System.Windows.Forms.Button
Private textBox1 As System.Windows.Forms.TextBox
Private mainMenu1 As System.Windows.Forms.MainMenu
#
Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
Private
Declare Function SipShowIM Lib "coredll.dll" (ByVal dwFlag As Integer) As Boolean
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
MyBase
.Dispose(disposing)
End Sub
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Private Sub InitializeComponent()
Me.mainMenu1 = New System.Windows.Forms.MainMenu
Me.button1 = New System.Windows.Forms.Button
Me.button2 = New System.Windows.Forms.Button
Me.textBox1 = New System.Windows.Forms.TextBox
'
'button1
'
Me.button1.Location = New System.Drawing.Point(8, 88)
Me.button1.Size = New System.Drawing.Size(88, 32)
Me.button1.Text = "Show SIP"
AddHandler button1.Click, AddressOf button1_Click
'
'button2
'
Me.button2.Location = New System.Drawing.Point(128, 88)
Me.button2.Size = New System.Drawing.Size(96, 32)
Me.button2.Text = "Hide SIP"
AddHandler button2.Click, AddressOf button2_Click
'textBox1
'
Me.textBox1.Location = New System.Drawing.Point(8, 144)
Me.textBox1.Size = New System.Drawing.Size(216, 22)
Me.textBox1.Text = ""
'
'Form1
'
Me.Controls.Add(Me.textBox1)
Me.Controls.Add(Me.button2)
Me.Controls.Add(Me.button1)
Me.Menu = Me.mainMenu1
Me.Text = "PocketPCSipView"
End Sub
Shared
Sub Main()
Application.Run(
New Form1)
End Sub
'Main
#End Region
'Show the SIP
Private Sub button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
SipShowIM(1)
End Sub
'Hide the SIP
Private Sub button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
SipShowIM(0)
End Sub
End
Class


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 About the author
 
John O Donnell
John O’Donnell is a former Microsoft UK employee and is an MCSE. Currently John works in Chicago for MAS Consulting (www.mcas.com) as a Senior Technical Consultant. He is available for C# contract work across the USA .
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 Comments
SIP VB.Net 2003 by Eugine On December 31, 2008
Hello, I am having a problem with an pocket PC app whereby I cannot see the SIP (soft keyboard) - I have tried using the suggested sipvisible but no such code word exists in either help or controls and so I am lost. The app works fine except that I have no way to enter data and I would have thought that the SIP would be automatically included on any app developed for a pocket pc - can you help me please as this is driving me crazy? Regards Eugine
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