Interpreted Basic SCREEN 9 May Fail with Mouse Driver Loaded (19869)


The information in this article applies to:

  • Microsoft Mouse driver for MS-DOS 6.x
  • Microsoft Mouse driver for MS-DOS 7.x
  • Microsoft Mouse driver for MS-DOS 8.x
  • Microsoft Mouse driver for MS-DOS 9.0
This article was previously published under Q19869

SUMMARY

Programs running interpreted Basic may fail when using screen mode 9 when the Microsoft Mouse driver is loaded.

This information applies to Microsoft Basic Interpreter versions 3.2 and earlier supplied with MS-DOS and all versions of the Microsoft Mouse driver.

MORE INFORMATION

When using an interpreted Basic such as GWBasic or BASICA, programs that use the following line may fail if the Microsoft Mouse driver is loaded: 
   10 SCREEN 9
This statement puts the video adapter into an EGA mode. The mouse driver may get confused about what video mode is actually being used after this call, causing a hang or other problems with the program.

To work around the problem, use the most current version of the Basic Interpreter.
Modification Type:MajorLast Reviewed:9/24/2003
Keywords:KB19869
©2003 Microsoft Corporation. All rights reserved.