FIX: Toolbar Button Count Is Wrong if Image Index is Invalid

• Microsoft Visual Basic Standard, Professional, and Enterprise Editions, 32-bit only, for Windows, version 4.0

SYMPTOMS

The Count property value of the Toolbar Buttons collection is not correct when a button without an image is shown on the Toolbar control.

CAUSE

This behavior occurs if an Invalid image parameter is used with the Add method on an ImageList control. The ImageList control supplies the images for the buttons on the Toolbar control.

RESOLUTION

Use a valid Image index number.

-or-

If you want a button to show without an image, trap the error and leave out the Image parameter in the Add method.

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 Basic 5.0.

MORE INFORMATION

Steps to Reproduce Problem

1. Start the 32-bit edition of Visual Basic 4.0. If it is already running, from the File menu, select New Project.



2. Add a Toolbar control, an Image List control, and a Command button to Form1.



3. Copy the following code to the Code window of Form1:

   
         Option Explicit
   
         Private Sub Command1_Click()
            Dim i As Integer
            Dim ImgX As ListImage
            Dim tbButton As Button
   
            Set ImgX = ImageList1.ListImages.Add(, , _
                    LoadPicture("C:\Visual Basic\Icons\Industry\bicycle.ico"))
            ' Modify the argument for the LoadPicture function to point to
            ' directory containing an icon.
   
            On Error Resume Next
            Form1.Toolbar1.ImageList = ImageList1
   
            ' Comment the next line to workaround problem.
            Set tbButton = Form1.Toolbar1.Buttons.Add(1, , "Node1", , 2)
   
            ' Uncomment one of the following lines to workaround problem.
            ' Uncomment this line if you want the image to appear on the
            ' button.
            ' Set tbButton = Form1.Toolbar1.Buttons.Add(1, , "Node1", , 1)
   
            ' Uncomment this line if you want a blank button
            ' Set tbButton = Form1.Toolbar1.Buttons.Add(1, , "Node1")
            MsgBox "Number of Buttons according to Count Property: " & _
                    Toolbar1.Buttons.Count
   
         End Sub 




4. On the Run menu, select Start, or press the F5 key. Click the Command button. A button appears on the Toolbar but the message box indicates no buttons on the Toolbar.

Additional query words: kbVBp400bug kbVBp500fix kbVBp kbdsd kbDSupport kbControl

Keywords : kbVBp400bug kbVBp500fix kbGrpVB
Version : WINDOWS:4.0
Platform : WINDOWS
Issue type : kbbug