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procedure TForm1.Timer1Timer(Sender: TObject);
var
AHandle: THandle;
begin
AHandle := FindWindow('TMessageForm',
PChar(Application.Title));
if AHandle > 0 then
SendMessage( ......
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type TOnMyCallBack = procedure(data:pchar; id:Integer);stdcall;
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procedure StartCall(param: TOnMyCallBack(data:pchar; id:Integer);stdcall;
begin
...
...
end;
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