TControl.WindowProc property
The handler for all messages.
Declaration
property WindowProc: TWndMethod read FWindowProc write FWindowProc;Description
WindowProc is set to WndProc by default.
When you ever change WindowProc, then remember the previous setting and delegate all unhandled messages to that method.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.