DL> It must be reasonably simple to do, but I have had no luck getting
 DL> WinShutdown() to work, nor the code I've seen around

I beleive the WinShutdownSystem() call will allow PM programs to stop and
wait for input ("Are You sure you want to quit??" type crap).

DosShutdown(),  on the other hand,  will _for sure_ shut the filesystems
down clean (without closing any programs).   If this is ok,  here's the
32bit version of the reboot program you couldn't get working (because you
had 16bit source):


 #include 
 #define INCL_NOPMAPI
 #define INCL_DOS
 #include 

 int main(void)
 {
     HFILE hf;
     APIRET rc;
     ULONG dummy;

     rc = DosOpen("DOS$", &hf, &dummy, 0L, FILE_NORMAL, FILE_OPEN,
         OPEN_ACCESS_WRITEONLY | OPEN_SHARE_DENYNONE |
         OPEN_FLAGS_FAIL_ON_ERROR, 0L);
     if(!rc){
         DosShutdown(0L);    // can't use stdin/stdout after this!
         //16 bit: DosDevIOCtl(NULL, NULL, 0xab, 0xd5, hf);        /* reboot */
         rc = DosDevIOCtl(hf, 0xd5, 0xab,
                          NULL, 0, NULL,
                          NULL, 0, NULL);
         /* we shouldn't actually make it this far */
         printf("ioctl returned %d\n", rc);
         DosClose(hf);
     }
     else
         printf("DOS.SYS not installed (sys%04u)\n", rc);
 }

--- Maximus/2 2.01