Deletes an empty key
#include <WinAPIReg.au3>
_WinAPI_RegDeleteEmptyKey ( $hKey [, $sSubKey = ''] )
| $hKey | Handle to an open registry key, or any of the following predefined keys: $HKEY_CLASSES_ROOT $HKEY_CURRENT_CONFIG $HKEY_CURRENT_USER $HKEY_LOCAL_MACHINE $HKEY_USERS |
| $sSubKey | [optional] The name of the key to delete. |
| Success: | 1. |
| Failure: | 0 and sets the @error flag to non-zero, @extended flag may contain the system error code. |
_WinAPI_RegDeleteEmptyKey() does not delete a key if it contains any subkeys or values. Use _WinAPI_RegDeleteTree() instead.
Search SHDeleteEmptyKey in MSDN Library.