PRB: Confusing Return Values from DDE topic WWW_ListWindows (191508)
The information in this article applies to:
- Microsoft Internet Explorer (Programming) 4.0
- Microsoft Internet Explorer (Programming) 4.01
- Microsoft Internet Explorer (Programming) 4.01 SP1
This article was previously published under Q191508 SYMPTOMS
Sending the DDE topic WWW_ListWindows to IExplore (Internet Explorer)
returns an array of DWORDS containing a sequence of integers 1-n, not the
HWNDs of windows opened by the Browser as implied in the documentation.
CAUSE
What is being returned is a sequence corresponding to the number of
instances of the Browser that are currently opened. For instance, if three
instances of Internet Explorer are running, then the WWW_ListWindows topic
will return, to the caller, an array of DWORD's containing the integers 1,
2, 3.
RESOLUTION
The WWW_ListWindows topic can only be used to determine the number of
instances of the browser that are running. To determine the windows owned
for each instance, an API call such as FindWindows() must be used. General
information on finding and enumerating windows is available in the MSDN
article "Win32 Window Hierarchy and Styles" by Kyle Marsh.
REFERENCES
MSDN article "Win32 Window Hierarchy and Styles" by Kyle Marsh 1993.
For additional information about , please see the following
article(s) in the Microsoft Knowledge Base:
160957 Dynamic Data Exchange Support in Microsoft Internet Explorer
| Modification Type: | Major | Last Reviewed: | 5/9/1999 |
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| Keywords: | kbDDE kbprb KB191508 |
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