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FileOpenDialog(IniDirectory,IniFile,IniExtension)
FileOpenDialog(IniDirectory,IniFile,)
FileOpenDialog(IniDirectory)

IniDirectoryѡļĳʼĿ¼ĬΪ
IniFileѡļĳʼλļĬΪ
IniExtensionѡļĺ׺ĬԶ

˵ִй̻ѡļ·ĶԻѡɹһ·ķű򷵻ش򿪿ַķű

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f=FileOpenDialog()//سѡļ·ĶԻѡɹ·򿪵Ϊfķű