Create a directory SysUtils unit
 function CreateDir ( const Dir : string ) : Boolean;
The CreateDir function creates a new directory Dir in the current directory.
If the create succeeded, the True is returned, otherwise the error can be obtained using GetLastError.
Related commands
ChDir Change the working drive plus path for a specified drive
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 : Create a new directory
  // Create a new directory in the current directory
  if CreateDir('TestDir')
  then ShowMessage('New directory added OK')
  else ShowMessage('New directory add failed with error : '+
Show full unit code
   New directory added OK