ObjectPascal ChDir Procedure Change the working drive plus path for a specified drive System unit

procedure ChDir ( const Directory : string ) ;

Description The ChDir procedure sets the working drive + path values to the supplied Directory.   There are as many working directories as drives on the target machine.   If the directory is invalid, you will get an error such as ElnOutError, and the directory will remain unchanged. Related commands CreateDir Create a directory GetCurrentDir Get the current directory (drive plus directory) GetDir Get the default directory (drive plus path) for a specified drive MkDir Make a directory RemoveDir Remove a directory RmDir Remove a directory SelectDirectory Display a dialog to allow user selection of a directory SetCurrentDir Change the current directory ForceDirectories Create a new path of directories		Example code : Getting and setting the directory for the C: drive var   directory : string; begin   // Get the directory for the C drive   GetDir(2, directory);   WriteLn('Default C drive directory = '+directory);   // Set the C directory to this value   ChDir(directory);   GetDir(2, directory);   WriteLn('Default C drive directory = '+directory);   // Try to set to an invalid value   ChDir('C:Bad/Path/Value');   GetDir(2, directory);   WriteLn('Default C drive directory = '+directory); end; Show full unit code    The following output is representative, and will necessarily vary    from PC to PC:       C:\Program Files\Borland\Delphi7\Projects    C:\Program Files\Borland\Delphi7\Projects       ElnOutError with error 'Invalid file name'