The Windows prolog/epilog option is required for Windows applications. It specifies whether to use special prolog and epilog code with each function; this code defines the current data segment for the given function.
You set this option by defining the value of the ?WIN option.
| Value | Meaning |
| 0 | Disable the special prolog/epilog code. |
| 1 | Enable the special prolog/epilog code. |
You can set the ?WIN value by using the = directive. The statement has the following form:
?WIN = 1By default, prolog and epilog code are enabled.