Control.ProcessKeyMessage(Message) Control.ProcessKeyMessage(Message) Control.ProcessKeyMessage(Message) Control.ProcessKeyMessage(Message) Method

定义

处理键盘消息。Processes a keyboard message.

protected public:
 virtual bool ProcessKeyMessage(System::Windows::Forms::Message % m);
protected internal virtual bool ProcessKeyMessage (ref System.Windows.Forms.Message m);
abstract member ProcessKeyMessage :  -> bool
override this.ProcessKeyMessage :  -> bool
Protected Friend Overridable Function ProcessKeyMessage (ByRef m As Message) As Boolean

参数

m
Message Message Message Message

通过引用传递的 Message,表示要处理的窗口消息。A Message, passed by reference, that represents the window message to process.

返回

如果消息已由控件处理,则为 true;否则为 falsetrue if the message was processed by the control; otherwise, false.

注解

当一个控件接收键盘消息时,调用此方法。This method is called when a control receives a keyboard message. 该方法首先确定控件是否具有一个父级;如果是,则调用父ProcessKeyPreview方法。The method first determines whether the control has a parent; if so, it calls the parent's ProcessKeyPreview method. 如果父ProcessKeyPreview方法不会处理该消息则ProcessKeyEventArgs调用方法来生成相应的键盘事件。If the parent's ProcessKeyPreview method does not process the message then the ProcessKeyEventArgs method is called to generate the appropriate keyboard events. m参数包含必须处理的窗口消息。The m parameter contains the window message that must be processed. 可能值为Message.Msg属性是 WM_CHAR、 WM_KEYDOWN、 WM_SYSKEYDOWN、 WM_KEYUP 和 WM_SYSKEYUP。Possible values for the Message.Msg property are WM_CHAR, WM_KEYDOWN, WM_SYSKEYDOWN, WM_KEYUP, and WM_SYSKEYUP.

继承者说明

重写时ProcessKeyMessage(Message)方法,控件应返回true以指示它已处理该键。When overriding the ProcessKeyMessage(Message) method, a control should return true to indicate that it has processed the key. 不会处理由控件的基类的结果的密钥ProcessKeyEventArgs(Message)应返回。For keys that are not processed by the control, the result of the base class's ProcessKeyEventArgs(Message) should be returned. 控件将很少,如果有过,需要重写此方法。Controls will seldom, if ever, need to override this method.

安全性

UIPermission
有关继承的类来调用此方法的所有窗口。for all windows for inheriting classes to call this method. 关联枚举:AllWindows的值UIPermissionWindowAssociated enumeration: AllWindows value of UIPermissionWindow.

适用于

另请参阅