FIX: ClassWizard Generates Incorrect UDN_DELTAPOS Handler (133276)
The information in this article applies to:
- The ClassWizard, when used with:
- Microsoft Visual C++, 32-bit Professional Edition 2.1
- Microsoft Visual C++, 32-bit Professional Edition 2.2
This article was previously published under Q133276 SYMPTOMS
ClassWizard creates incorrect code for a handler for the UDN_DELTAPOS
notification message of the CSpinButtonCtrl common control.
RESOLUTION
The generated handler function will look like this (assuming that the
CSpinButtonCtrl is in a dialog):
void CAboutDlg::OnDeltaposSpin1(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_UPDOWN;
// TODO: Add your control notification handler code here
*pResult = 0;
}
Modify the code to look like this:
void CAboutDlg::OnDeltaposSpin1(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_UPDOWN* pUpDown = (NM_UPDOWN*)pNMHDR;
// TODO: Add your control notification handler code here
*pResult = 0;
}
By typecasting the pointer to the NMHDR structure, you can access
additional data that is passed after the NMHDR.
STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed
at the beginning of this article. This problem was corrected in Visual C++,
32-bit Edition, version 4.0.
REFERENCES
For more information about the CSpinButtonCtrl and the up down common
control, please see the Class Library Reference in Books Online and the
Win32 Software Development Kit (SDK) documentation.
| Modification Type: | Major | Last Reviewed: | 10/17/2003 |
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| Keywords: | kbbug kbfix KbUIDesign kbwizard KB133276 |
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