hi Dmitry,

 DMG> I have found that under TSHELL, DOS executables cannot be run by
 DMG> "start" command (that appears to call DosStartSession) but under
 DMG> PM environment, they can be run. Where is the difference and how
 DMG> can I run realmode EXE under TSHELL?

The difference is in the size of the structure: in a non-PM environment,
the Length field should be set to 32.  O, and you cannot start windowed
sessions either...

   rc = DosStartSession(&sdata,&newSID,&newPID);
		
   /* if PM not loaded... */
   if (ERROR_SMG_INVALID_DATA_LENGTH == rc)
   {
      doPM = 0;
      switch (sdata.SessionType)
      {
          case SSF_TYPE_FULLSCREEN:
	  case SSF_TYPE_VDM:
               break;
	  case SSF_TYPE_WINDOWEDVDM:
               sdata.SessionType = SSF_TYPE_VDM;
               break;
          default:
               sdata.SessionType = SSF_TYPE_DEFAULT;
               break;
     }
     sdata.Length = 32;
     rc = DosStartSession(&sdata,&newSID,&newPID);
  }


groetjes,
	  hugo
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E-mail: huug{at}poboxes.com