MaskedTextBox.ProcessKeyMessage(Message) Method

Definition

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Source:

MaskedTextBox.cs

Overrides the base implementation of this method to handle input language changes.

protected public:
 override bool ProcessKeyMessage(System::Windows::Forms::Message % m);

protected internal override bool ProcessKeyMessage (ref System.Windows.Forms.Message m);

override this.ProcessKeyMessage : Message -> bool

Protected Friend Overrides Function ProcessKeyMessage (ByRef m As Message) As Boolean

Parameters

m

Message

A Message, passed by reference that represents the window message to process.

Returns

Boolean

true if the message was processed by the control; otherwise, false.

Remarks

MaskedTextBox overrides its base control's implementation of ProcessKeyMessage to properly handle character events when the user is entering characters using an Input Method Editor (IME), such as is used for entering Japanese, Chinese, and other complex non-Latin scripts. ProcessKeyMessage detects any WM_CHAR messages that occur after it receives a WM_IME_CHAR message and suppresses them in order to prevent these characters from showing up in the control. If you derive from this control and override this message, you should duplicate this behavior if you wish your new control to work with IMEs.