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 FileRead, FileWrite  FileSeek     ,
  FileOpen  FileCreate.

14.12.5    

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ChangeFileExt	System::AnsiString ChangeFileExt( const System::AnsiString FileName, const System::AnsiString Extension)   FileName     Extension;    	SysUtils.hpp
ExpandFileName	System::AnsiString ExpandFileName( const System::AnsiString FileName)   FileName,       ;      	SysUtils.hpp
ExpandUNCFile Name	System::AnsiString ExpandUNCFileName( const System::AnsiString FileName)   FileName,          UNC: \\<servername>\<sharename>>>,     	SysUtils.hpp
ExtractFileDir	System::AnsiString ExtractFileDir( const System::AnsiString FileName)  FileName     	SysUtils.hpp
ExtractFileDrive	System::AnsiString ExtractFileDrive( const System::AnsiString FileName)   FileName (, :)    UNC: \\<serverna-me>\<sharename>>>,     	SysUtils.hpp
ExtractFileExt	System::AnsiString ExtractFileExt( const System::AnsiString FileName)   FileName	SysUtils.hpp
ExtractFileName	System::AnsiString ExtractFileName( const System::AnsiString FileName)  ,   FileName, ..        	SysUtils.hpp