Remove a directory System unit
 procedure RmDir(const DirectoryName string);
The RmDir procedure removes a directory from the current directory.
If the directory does not exist, an EInOutError exception is thrown.
You can avoid such an exception by preventing IO errors using the {$IOChecks Off} compiler directive. You must then check the IOResult value to see the outcome of your IO operation (rememering that use of IOResult resets the value).
Related commands
$IOChecksWhen on, an IO operation error throws an exception
ChDirChange the working drive plus path for a specified drive
CreateDirCreate a directory
GetCurrentDirGet the current directory (drive plus directory)
IOResultHolds the return code of the last I/O operation
MkDirMake a directory
RemoveDirRemove a directory
SelectDirectoryDisplay a dialog to allow user selection of a directory
SetCurrentDirChange the current directory
ForceDirectoriesCreate a new path of directories
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Example code : Create a directory and then remove it
  error : Integer;

  // Try to create a new subdirectory in the current directory
  // Switch off I/O error checking
  {$IOChecks off}

  // Did the directory get created OK?
  error := IOResult;
  if error = 0
  then ShowMessage('Directory created OK')
  else ShowMessageFmt('Directory creation failed with error %d',[error]);

  // Delete the directory to tidy up

  // Did the directory get removed OK?
  error := IOResult;
  if error = 0
  then ShowMessage('Directory removed OK')
  else ShowMessageFmt('Directory removal failed with error %d',[error]);
Show full unit code
  Directory created OK
  Directory removed OK
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