Knowledge Base

PRB: 16-Bit App Launched from Service Always in Own VDM

Article ID: 154115

Article Last Modified on 11/21/2006

Microsoft Win32 Application Programming Interface, when used with:
- Microsoft Windows NT 3.51 Service Pack 5
- Microsoft Windows NT 4.0
- Microsoft Windows 2000 Standard Edition
- Microsoft Windows XP Professional

This article was previously published under Q154115

SYMPTOMS

When a 16-bit Windows application is launched from a Microsoft Windows NT, Windows 2000, or Windows XP service or from a 32-bit process that was launched from a service, the Windows application is always launched into its own separate VDM (Virtual DOS Machine). 16-bit applications launched by other 16-bit applications always run in the same VDM.

STATUS

This behavior is by design.

Keywords: kb16bitonly kbkernbase kbprb kbservice KB154115