Form.InputLanguageChanging Event (System.Windows.Forms)

InputLanguageChanging Event

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This page is specific to

Microsoft Visual Studio 2010/.NET Framework 4

Other versions are also available for the following:

.NET Framework Class Library

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)

Syntax

Visual Basic

Public Event InputLanguageChanging As InputLanguageChangingEventHandler

public event InputLanguageChangingEventHandler InputLanguageChanging

Visual C++

public:
 event InputLanguageChangingEventHandler^ InputLanguageChanging {
    void add (InputLanguageChangingEventHandler^ value);
    void remove (InputLanguageChangingEventHandler^ value);
}

member InputLanguageChanging : IEvent<InputLanguageChangingEventHandler,
    InputLanguageChangingEventArgs>

Remarks

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.

Examples

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.

Visual Basic

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.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Culture", e.Culture)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "SysCharSet", e.SysCharSet)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Cancel", e.Cancel)
    messageBoxVB.AppendLine()
    MessageBox.Show(messageBoxVB.ToString(),"InputLanguageChanging Event")

End Sub

private void Form1_InputLanguageChanging(Object sender, InputLanguageChangingEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "InputLanguage", e.InputLanguage );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Culture", e.Culture );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "SysCharSet", e.SysCharSet );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Cancel", e.Cancel );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "InputLanguageChanging Event" );
}

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

Reference

Form Class

System.Windows.Forms Namespace

InputLanguageChanged

OnInputLanguageChanging