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a:=Ta.Create(application);
  try
    a.ShowModal;
  finally
    a.Free;
    a:=nil;
  end;
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a:=Ta.Create(application); //´´½¨
  try
    a.ShowModal;          //show³öÀ´
  finally                 
    a.Free;                //ÊÍ·Å
    a:=nil;                //½«a±äÁ¿Öÿգ¬±ÜÃâÒ°Ö¸Õë
  end;

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1. ±àÂë·ç¸ñ²»·ûºÏDelphi±àÂë¹æ·¶
2. ÀàÃüÃû²»Äܱí´ïÀàµÄÓÃ; £¨Ta£©
3. ²ÎÊýÃüÃû²»Äܱí´ï²ÎÊýÓÃ; (a)

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a := Ta.Create(application);
try
  a.ShowModal;
finally
  a.Free;
  a := nil;
end;

---

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1. ±àÂë·ç¸ñ²»·ûºÏDelphi±àÂë¹æ·¶
2. ÀàÃüÃû²»Äܱí´ïÀàµÄÓÃ; £¨Ta£©
3. ²ÎÊýÃüÃû²»Äܱí´ï²ÎÊýÓÃ; (a)

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a := Ta.Create(application);
try
  a.ShowModal;
finally
  a.Free;
  a := nil;
end;

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