CONSOLE SET SCREEN - no error returned

[Mike Doty]

'Can't get an error from CONSOLE SET SCREEN with XP SP3
'Also, if system starts in FULL SCREEN may need to get to window mode
'The easiest way I've found is to SHELL "DOSBOX.EXE /WINDOW" 'Perfect Sync
' I've probably reported this before, but cannot find it.
'

#COMPILE EXE
#DIM ALL
FUNCTION PBMAIN () AS LONG
  'The problem here is that the buffer size must be as large as size or get scroll bars
  LOCAL r&,c  AS LONG    'rows and columns wanted
  LOCAL rr,cc AS LONG    'after CONSOLE GET SCREEN
  LOCAL counter AS LONG
  REM SHELL "DOSBOX.EXE /WINDOW"          'another matter
  r   = 30               'request rows
  c   = 71               'request columns
  SLEEP 250
  CONSOLE SET SCREEN r, c
  SLEEP 250
  IF ERR THEN
    ? "CONSOLE SET SCREEN never showed an error, until now! (XP SP3)";ERRCLEAR
    WAITKEY$
    EXIT FUNCTION
  END IF
  SLEEP 1000
  CONSOLE GET SCREEN TO rr&, cc&
  SLEEP 1000
  PRINT " r"," c"," rr"," cc"
  ? r,c,rr,cc
  IF r <> rr OR c <> cc THEN
    BEEP
    ? "Failed, but no error reported.
    ? "Press any key to end program"
    WAITKEY$
    EXIT FUNCTION
  ELSE
    ? "Success, you may continue"
    WAITKEY$
    FOR counter = 1 TO r -1
      ? "Row"r
    NEXT
    ? "Row";r
  END IF
  WAITKEY$
END FUNCTION

[Mike Doty]

Submitted to support.
Is there a way to determine valid screen sizes before CONSOLE SET SCREENl?

[Michael Mattias]

There's a GetLargestConsoleWindowSize() function, if all you are interested in is the max size.

Or,

You can try SetConsoleScreenBuffer () function with different X and Y values in the COORD structure, and test if Windows Complains? Might be ugly, but might not.

Are you sure 'invalid screen size' is your problem? Or is this a guess? Or is it a whole 'nother question?

MCM

[Mike Doty]

It is not a guess, posted code above.
I've had this problem for a long time.
Thanks for the info, I'll check them out.
I do very little with consoles, but it is nice to know it will work on other machines. DosBox /FullScrn and DosBox /Window have been needed.

[Mike Doty]

Searching for that was exactly what I needed!
Might even write more console apps, now!

http://www.powerbasic.com/support/pbforums/showthread.php?t=36795