Provides message handling for all messages that the control does not fully process itself.
procedure DefaultHandler(var Message); override;
Override DefaultHandler to change the default message handling for the edit control. The Message parameter can be cast to a TMessage type, to obtain the WParam, LParam, and Result of the message. If the Result of the message is non-zero, the message has already been handled. Set the Result field to a non-zero value to prevent further processing of the message by the inherited method.
Calling inherited in a message-handling method results in a call to the ancestor's DefaultHandler method if that ancestor does not specify a handler for the message being handled.
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