| Item | Description |
| Blank() | Returns empty values for the data types A, C, D, L, M and N. |
| Complement() | Creates the complement for values of data type C, D, L, M, N |
| Default() | Assigns a default value to a variable. |
| DosParam() | Returns the command line parameters passed to an xHarbour application. |
| ExeName() | Returns the EXE file name of an xHarbour application. |
| KbdStat() | Determines the state of special keys like Ctrl or Shift keys. |
| KeySec() | Starts a timer to write a key code into the keyboard buffer. |
| KeyTime() | Writes a key code into the keyboard buffer at a specified time. |
| LtoC() | Converts a logical value to a character. |
| Nul() | Returns a null string (""). |
| XtoC() | Converts values of data type C, D, L, M, N to a string. |
