VBDOS.EXE Environment Screen Blanks Out When Many Files Loaded

• Microsoft Visual Basic Standard and Professional Editions for MS-DOS, version 1.0

SYMPTOMS

Under certain conditions, if you load a large number of files into the VBDOS.EXE programming environment, you may encounter a blank or partially blank screen. The number of files that can cause this problem varies, depending on your machine's memory configuration. Normally, the VBDOS.EXE environment displays an "Out of Memory" error message before you encounter this problem.

If this problem occurs, you must either decrease the number of loaded forms and modules, or increase the amount of memory available to the VBDOS.EXE programming environment to work around the problem.

STATUS

Microsoft has confirmed this to be a bug in the Standard and Professional Editions of Microsoft Visual Basic for MS-DOS, version 1.0. We are researching this bug and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Listed below is an example of this blank screen problem. Note that this problem only occurs when there is a low amount of conventional memory (approximately 350K or less) available.

Steps to Reproduce the Problem

1. Start VBDOS.EXE.



2. Load the following files (or any files for this example) with the Add File... option from the File Menu:

   
      Bookcard.frm          cmndlg.frm         setupopt.frm
      booklist.frm          controlP.frm       setuppth.frm
      booklook.frm          debug.frm          setupsts.frm
      booksrch.frm          fontdemo.frm       spindemo.frm
      bookstck.frm          graphics.frm       tbutdemo.frm
      calc.frm              helpf.frm          torus.frm
      chrtattr.frm          helputil.frm       chrtdata.frm
      notepad.frm           chrtsubs.bas       chrtfont.frm
      qlbview.frm           chrttype.frm       seek.frm
      bookgen.bas           clock.frm          setupmsg.frm
      chart.bas 




3. While loading these files, you may notice the screen blanks out (either partially or completely). This will not be the case with some machines, however, because it depends on the way the machine's memory is configured.

Additional query words: VBmsdos BugList1.00 1.00

Keywords :
Version : MS-DOS:1.0
Platform : MS-DOS
Issue type :