BUG: Cannot Set ImageList Property of Treeview Visually (163803)


The information in this article applies to:

  • Microsoft Visual FoxPro for Windows 5.0
This article was previously published under Q163803

SYMPTOMS

A form containing the Treeview control suddenly loses the images shown in the Treeview. This happens after any property of the Treeview control was modified in the Form Designer.

CAUSE

Right-clicking on the Treeview control in the Form Designer reveals a context menu. The bottom bar of that menu opens the TreeCtrl Properties dialog box. That dialog box holds a PageFrame with three pages. Page 1 has the caption "General." It holds a stack of nine ComboBox controls, plus other objects. The fifth ComboBox from the top is labeled "ImageList" (without the quotes).

Comctl32.ocx contains both the ImageList control and the Treeview control.

With the version of Comctl32.ocx that originally came with Visual FoxPro 5.0 the ImageList to be used with the Treeview control could be selected from that ComboBox on the General page of the TreeCtrl Properties dialog box. The developer could drop the ComboBox down and see all of the ImageList controls on the current form. Typically that would be one, but the application design might require multiple ImageLists. A Treeview can be associated with any one of those, but only one.

Several Microsoft developer products that have been released since the release of Visual FoxPro version 5.0 install a revised Comctl32.ocx.

In the Form Designer of Visual FoxPro 5.0, the new version of Treeview no longer lists, in the TreeCtrl properties general page, the ImageLists that reside on the current form. It shows the expression <none>.

Clicking the "Apply" button at the bottom of the page sets all of the properties to the settings shown, so the new ImageList property is "none."

RESOLUTION

The ImageList must be specified in code. For example, if the form has an ImageList in OLE container control "OleControl1," then in the Init event method for the OLE container control that holds the Treeview, add a command similar to the following: 

   This.Object.Imagelist = Thisform.Olecontrol1.Object

The above is only a suggestion. The specifics of the application determines where to make the modification and the appropriate syntax to use.

NOTE: The symptoms listed in this article also apply to the ListView control. The code for a workaround using the ListView control follows: 

   This.object.icon = thisform.olecontrol1.object
   This.object.smallicon = thisform.olecontrol2.object

STATUS

Microsoft has confirmed this to be a problem 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 Behavior

Use the following steps in Microsoft Visual FoxPro 5.0 for Windows:

  1. Modify a form that contains a TreeCtrl control.
  2. Modify any property of the Treeview within the TreeCtrl properties dialog box
  3. Click Apply, then OK. The value "<none>" is now saved as the ImageList property. Consequently no ImageList is specified for the Treeview
Modification Type:MajorLast Reviewed:8/4/1999
Keywords:KB163803
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