INFO: Windows WM_SYSTIMER Message Is an Undocumented Message
Article ID: 108938
Article Last Modified on 7/11/2005
APPLIES TO
- Microsoft Platform Software Development Kit-January 2000 Edition
This article was previously published under Q108938
SUMMARY
The WM_SYSTIMER message in Windows is an undocumented system message; it
should not be trapped or relied on by an application. This message can
occasionally be viewed in Spy or in CodeView while debugging.
Windows uses the WM_SYSTIMER message internally to control the scroll rate
of highlighted text (text selected by the user) in edit controls, or
highlighted items in list boxes.
NOTE: The WM_SYSTIMER message is for Windows's internal use only and can be
changed without prior notice.
Keywords: kbinfo kbwndw KB108938