こう書くべきでは?

//---------------------------------------------------------------------------
void __fastcall TForm1::test(int& retval)
{
try {
try {
retval = 1;
}
catch(...) {
retval = 2;
}
}
__finally {
ShowMessage("come");
retval = 3;
}
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
int retval = 0;
test(retval);
ShowMessage(IntToStr(retval));
}
//---------------------------------------------------------------------------