FIX: OLE Drag/Drop of ListView Control Fails

• Microsoft Visual Basic Control Creation, Learning, Professional, and Enterprise Editions for Windows, version 5.0

SYMPTOMS

In Visual Basic 5.0, the OLE Drag-and-Drop functionality of the ListView control fails to function correctly if the OLEDragMode property of the ListView control is set to 0 (Manual). Automatic operation of OLE Drag-and- Drop functions correctly.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been fixed in Visual Studio 97 Service Pack 2.

For more information on the Visual Studio 97 Service Pack 2, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q170365
   TITLE     : INFO: Visual Studio 97 Service Packs - What, Where, and Why

   ARTICLE-ID: Q171554
   TITLE     : INFO: Visual Basic 5.0 Fixes in Visual Studio 97
               Service Pack 2

MORE INFORMATION

Steps to Reproduce Behavior

1. Create a new Standard EXE Project.

2. Place two ListView controls on the form (ListView1 and ListView2).

3. Place the following code into the General Declarations section of the form:

       Private Sub Form_Load()
           Dim Li As ListItem
           Set Li = ListView1.ListItems.Add(, , "hello")
           Set Li = ListView1.ListItems.Add(, , "hello2")
           Set Li = ListView1.ListItems.Add(, , "hello3")
       End Sub
   
       Private Sub ListView1_MouseDown(Button As Integer, Shift As Integer, _
       x As Single, y As Single)
          Set ListView1.SelectedItem = ListView1.HitTest(x, y)
          ' In the following line any ICO file will do
          ListView1.DragIcon = LoadPicture _
          ("C:\program files\microsoft visual basic\samples\calc\calc.ico")
          ListView1.Drag vbBeginDrag
       End Sub
   
       Private Sub ListView2_DragDrop(Source As Control, x As Single, _
       y As Single)
          MsgBox "Hello"
          Dim li2 As ListItem
          Set li2 = ListView2.ListItems.Add(, , Source.SelectedItem.Text)
       End Sub
   
   

4. Run the form and attempt to drag "hello" from ListView1 to ListView2. Note that the drag icon disappears when the item is moved.