MR> I have written a resident programm under DOS, which disables Ctrl-Alt-Del
 MR> sequence (also, if C-A-D is pressed, my procedure is 
 MR> called). This programm
 MR> redirects int 09h. It works well under DOS. But I need this to work under
 MR> OS/2 in DOS task. But it doesn't work... :-((( When I press Ctrl-Alt-Del,
 MR> it performs something like "cold boot" - after rebooting, when OS/2
 MR> starts, it runs CHKDSK...

 MR> Summary: I want to write a resident program, which will run under DOS
 MR> task in OS/2, and when I press Ctrl-Alt-Del, it will call my own
 MR> procedure. That's all...


The following OS/2 program will disable C-A-D (and CTRL-ESC, ALT-ESC). Once
it is disabled,  your legacy code _might_ work.  If it doesn't, the only
way I can think to make this work is to modify the keyboard device driver
(IBMKBD.SYS) to cooperate with your DOS program.  This would be fine for an
internal solution,  but not for shrink-wrap or shareware (since people
don't like replacing system device drivers).


 // From my "Undocumented OS/2" coloradOS/2'95 seminar
 // P.Fitzsimmons
 #define INCL_NOPMAPI
 #define INCL_DOS
 #define INCL_DOSDEVIOCTL
 #include 
 #include 
 #include 

 int main(void)
 {
     HOTKEY hk;
     HFILE hf;
     APIRET rc;
     ULONG dummy;
     ULONG parminout=0;
     ULONG datainout=0;

     rc = DosOpen("KBD$", &hf, &dummy, 0L, FILE_NORMAL, FILE_OPEN,
         OPEN_ACCESS_WRITEONLY | OPEN_SHARE_DENYNONE |
         OPEN_FLAGS_FAIL_ON_ERROR, 0L);
     if(!rc){
         memset(&hk, 0, sizeof(HOTKEY));
         hk.idHotKey = -1;       // special id -- see PDD.INF
         parminout=sizeof(HOTKEY);
         rc=DosDevIOCtl(hf,
                        IOCTL_KEYBOARD,
                        KBD_SETSESMGRHOTKEY,
                        &hk,
                        sizeof(HOTKEY),
                        &parminout,
                        NULL,
                        0,
                        &datainout);
     }
     if(rc) printf("error %04x\n", rc);
     return rc;
 }



--- Maximus/2 3.00