Processes a keyboard message.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)] [SecurityPermissionAttribute(SecurityAction.InheritanceDemand, Flags = SecurityPermissionFlag.UnmanagedCode)] protected internal virtual bool ProcessKeyMessage( ref Message m )
Return ValueType: System.Boolean
true if the message was processed by the control; otherwise, false.
This method is called when a control receives a keyboard message. The method first determines whether the control has a parent; if so, it calls the parent's ProcessKeyPreview method. If the parent's ProcessKeyPreview method does not process the message then the ProcessKeyEventArgs method is called to generate the appropriate keyboard events. The m parameter contains the window message that must be processed. Possible values for the Message.Msg property are WM_CHAR, WM_KEYDOWN, WM_SYSKEYDOWN, WM_KEYUP, and WM_SYSKEYUP.Notes to Inheritors
When overriding the method, a control should return true to indicate that it has processed the key. For keys that are not processed by the control, the result of the base class's ProcessKeyEventArgs should be returned. Controls will seldom, if ever, need to override this method.