A Service May Not Set Hooks on 32-bit GUI ApplicationsLast reviewed: May 19, 1997Article ID: Q163892 |
The information in this article applies to:
SYMPTOMSOn a computer running Microsoft Windows NT 4.0, a Win32 Service cannot set a hook on a 32-bit GUI application.
CAUSEWhen an interactive service wants to hook a user's process, it is not allowed to because the desktop opened does not have the DF_ALLOWOTHERACCOUNTHOOK flag set.
RESOLUTIONA fix was developed such that if "Allow Service to Interact with Desktop" is set, the service is allow to set hooks on a user's process. This fix requires Microsoft Windows NT version 4.0 Service Pack 2 to be installed.
STATUSMicrosoft has confirmed this to be a problem in Windows NT version 4.0. This problem was corrected in the latest Microsoft Windows NT 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):
S E R V P A C K Keywords : kbbug4.00 kbfix4.00.sp3 nt32ap NTSrvWkst prodnt kbprg Version : 4.0 Platform : winnt Issue type : kbbug Solution Type : kbservicepack |
================================================================================
© 1998 Microsoft Corporation. All rights reserved. Terms of Use. |