...flush the mouse/keyboard buffer?

procedure EmptyKeyQueue;
var
  Msg: TMsg;
begin
  while PeekMessage(Msg, 0, WM_KEYFIRST, WM_KEYLAST,
    PM_REMOVE or PM_NOYIELD) do;
end;

procedure EmptyMouseQueue;
var
  Msg: TMsg;
begin
  while PeekMessage(Msg, 0, WM_MOUSEFIRST, WM_MOUSELAST,
    PM_REMOVE or PM_NOYIELD) do;
end;

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