BUG: DBCombo Dropdown List Detaches While Dragging Parent Form (142469)


The information in this article applies to:

  • Microsoft Visual Basic Standard Edition, 32-bit, for Windows 4.0
  • Microsoft Visual Basic Professional Edition, 16-bit, for Windows 4.0
  • Microsoft Visual Basic Professional Edition, 32-bit, for Windows 4.0
  • Microsoft Visual Basic Enterprise Edition, 16-bit, for Windows 4.0
  • Microsoft Visual Basic Enterprise Edition, 32-bit, for Windows 4.0
This article was previously published under Q142469

SYMPTOMS

The DBCombo control drop-down list becomes detached from the control and the parent form if the user drags the form while the drop-down list is displayed in Microsoft Visual Basic version 4.0 for Windows. This behavior is reproducible in both the 16-bit and 32-bit versions of Visual Basic version 4.0 running under the Microsoft Windows, Microsoft Windows NT, and Microsoft Windows 2000 operating systems. In Microsoft Windows NT, this behavior can be eliminated by clearing the "Full Drag" option in the Desktop dialog box of the Control Panel.

In Microsoft Windows 2000, this behavior can be eliminated by clearing the "Show window contents while dragging" option in the Display dialog box of the Control Panel.

In Microsoft Windows 95 and Windows 98, the behavior can be eliminated by unchecking the Show window contents while dragging item in the Plus! tab of the Display Properties dialog. The Display Properties dialog can be viewed by right- clicking on the Windows 95 and Windows 98 desktop and selecting 'Properties'. This setting can also be controlled programmatically by the SystemParametersInfo API and the SPI_GETDRAGFULLWINDOWS and SPI_SETDRAGFULLWINDOWS constants. For more information, see your Windows API documentation.

STATUS

Microsoft has confirmed this to be an issue in the Microsoft products listed at the beginning of this article. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Steps to Reproduce Problem

  1. Start a new project in Visual Basic. Form1 is created by default.
  2. Add a Data control, "Data1" by default, to Form1 and set the following properties: 
       DataBaseName = BIBLIO.MDB
   RecordSource = Authors
  3. Add a DBCombo control to Form1, "DBCombo1" by default, and set the following properties: 
       RowSource = Data1
   ListField = Author
   Style = 0 - Drop-down Combo or 2 - Drop-down List
  4. On the Run menu, click Start or press the F5 key to start the program. Open the DBCombo list box and then drag the Form1 form. Note that the list separates from the DBCombo control.
Modification Type:MajorLast Reviewed:12/3/2003
Keywords:kbbug KB142469
©2003 Microsoft Corporation. All rights reserved.