BUG: Run-Time Error 458 When Late-Binding Rich TextBox Control

• Microsoft Visual Basic Learning, Professional, and Enterprise Editions for Windows, versions 5.0, 6.0

SYMPTOMS

When you access the BackColor property of a Rich TextBox Control that is late-bound, the following error occurs when you run the program:

Error 458: Variable uses an Automation type not supported in Visual Basic.

RESOLUTION

Instead of late-binding the control, try to early-bind it. For example, you can replace the following code:

   Dim ctl As Control
   Set ctl = RichTextBox1 

   Dim ctl As RichTextBox
   Set ctl = RichTextBox1 

STATUS

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

MORE INFORMATION

Steps to Reproduce Behavior

1. Create a new Standard EXE project in Visual Basic. Form1 is created by default.



2. Select Components from the Project menu, browse for the Microsoft Rich TextBox Control 6.0, and select it. Add the control to Form1.



3. Paste the following code into the code window of Form1:

   
         Private Sub Form_Load()
            Dim ctl As Control
            Set ctl = RichTextBox1
            ctl.BackColor = vbRed
            If ctl.BackColor <> vbRed Then
               MsgBox "fail"
            End If
         End Sub
    




4. Press F5 to run the project.

Error 458: Variable uses an Automation type not supported in Visual Basic

Keywords : kbcode kberrmsg kbCtrl kbVBp500bug kbVBp600bug kbGrpVB
Version : WINDOWS:5.0,6.0
Platform : WINDOWS
Issue type : kbbug