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Form.InputLanguageChanging Event

Occurs when the user attempts to change the input language for the form.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

Public Event InputLanguageChanging As InputLanguageChangingEventHandler
Dim instance As Form 
Dim handler As InputLanguageChangingEventHandler 

AddHandler instance.InputLanguageChanging, handler

This event occurs before the change of input language is made for the form. You can cancel the language change by setting the Cancel property of the InputLanguageChangingEventArgs passed to your event handler to false. If the event is canceled, the input language is not changed. You can use this event to determine whether the requested input language change is appropriate for your application.

For more information about handling events, see Consuming Events.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the InputLanguageChanging event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.

To run the example code, paste it into a project that contains an instance of type Form named Form1. Then ensure that the event handler is associated with the InputLanguageChanging event.

Private Sub Form1_InputLanguageChanging(sender as Object, e as InputLanguageChangingEventArgs) _ 
     Handles Form1.InputLanguageChanging

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "InputLanguage", e.InputLanguage)
    messageBoxVB.AppendFormat("{0} = {1}", "Culture", e.Culture)
    messageBoxVB.AppendFormat("{0} = {1}", "SysCharSet", e.SysCharSet)
    messageBoxVB.AppendFormat("{0} = {1}", "Cancel", e.Cancel)
    MessageBox.Show(messageBoxVB.ToString(),"InputLanguageChanging Event")

End Sub

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0