| BOOL ExitWindows(dwReturnCode, reserved) | |||||
| DWORD dwReturnCode; | /* return or restart code | */ | |||
| UINT reserved; | /* reserved; must be zero | */ | |||
The ExitWindows function can restart Windows, terminate Windows and return control to MS-DOS, or terminate Windows and restart the system. Windows sends the WM_QUERYENDSESSION message to notify all applications that a request has been made to restart or terminate Windows. If all applications “agree” to terminate, Windows sends the WM_ENDSESSION message to all applications before terminating.
dwReturnCode
Specifies whether Windows should restart, terminate and return control to MS-DOS, or terminate and restart the system. The high-order word of this parameter should be zero. The low-order word specifies the return value to be passed to MS-DOS when Windows terminates. The low-order word can be one of the following values:
| Value | Meaning |
| EW_REBOOTSYSTEM | Causes Windows to terminate and the system to restart. |
| EW_RESTARTWINDOWS | Causes Windows to restart. |
reserved
Reserved; must be zero.
The return value is zero if one or more applications refuse to terminate. The function does not return a value if all applications agree to be terminated.