Call VBSetErrorMessage() In Response to VBM_ Messages Only (80403)
The information in this article applies to:
- Microsoft Visual Basic Standard Edition for Windows 4.0
- Microsoft Visual Basic Professional Edition for Windows 2.0
This article was previously published under Q80403 SYMPTOMS
The Visual Basic Control Development Kit (CDK) API function
VBSetErrorMessage() operates correctly only when called in response
to a VBM_ message, such as VBM_SETPROPERTY.
STATUS
This behavior is by design.
MORE INFORMATION
The VBSetErrorMessage() function can be called from a custom control in
response to a VBM_ message to pass an error number and message back to
Visual Basic. When execution returns to Visual Basic, a trappable
run-time error will occur, with the error number and message specified
in the call to VBSetErrorMessage.
The VBSetErrorMessage routine works only in response to messages that
originate from Visual Basic itself (VBM_ messages). Visual Basic
responds to the return code for VBM_ messages, and in turn sets the
error condition in the program. If the return code for a VBM_ message
is True, Visual Basic will generate an error condition. For other
messages (non VBM_ messages), Visual Basic must pass along the return
code to the originator of the message (usually Windows); therefore,
Visual Basic will not generate an error condition for these messages.
REFERENCES
"Microsoft Visual Basic: Control Development Guide," (c) 1992, page
117 (shipped with Professional Toolkit)
"Microsoft Visual Basic: Control Development Guide," (c) 1991, page
108 (part no. 20666)
| Modification Type: | Minor | Last Reviewed: | 8/15/2005 |
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| Keywords: | KB80403 |
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