PRB: WLL May Cause a GP Fault While Closing Word (131723)
The information in this article applies to:
- Microsoft Office 2000 Developer
- Microsoft Word for Windows 6.0
- Microsoft Word for Windows 6.0a
- Microsoft Word for Windows 6.0c
This article was previously published under Q131723 SYMPTOMS
A WLL created using the CAPI may cause a general protection (GP) fault
while closing Word.
CAUSE
This problem can occur if the WLL tries to subclass Word by unloading
the WLL while it is responding to a message.
For example, if you are processing the WM_CLOSE command and call the
following CAPI code, a GP fault may occur:
InitWCB( &wcb, 0, NULL, 0 );
AddStringParam( &wcb, "c:\\winword\\subclass.wll" );
wdCommandDispatch( wdDeleteAddIn, 0, wcb.cArgs, wcb.wdoprArgs, lpwdoprNil);
You cannot unload the WLL or un-subclass Word when the WLL contains the
code that is responding to the message. More precisely, you cannot
terminate the WLL while it is in the middle of responding to the WM_CLOSE
message.
STATUS
This is a design feature of Windows.
MORE INFORMATION
Windows sends the WM_CLOSE message to a program when you choose the Close
command from the System menu.
REFERENCES
Microsoft Windows SDK "Guide to Programming, Part 2"
| Modification Type: | Minor | Last Reviewed: | 3/9/2005 |
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| Keywords: | kbNoUpdate kbprb KB131723 |
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