Knowledge Base

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

Article ID: 191205

Article Last Modified on 5/13/2003

Microsoft Visual Basic 5.0 Learning Edition
Microsoft Visual Basic 6.0 Learning Edition
Microsoft Visual Basic 5.0 Professional Edition
Microsoft Visual Basic 6.0 Professional Edition
Microsoft Visual Basic 5.0 Enterprise Edition
Microsoft Visual Basic 6.0 Enterprise Edition

This article was previously published under Q191205

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

with:

   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

Create a new Standard EXE project in Visual Basic. Form1 is created by default.
Select Components from the Project menu, browse for the Microsoft Rich TextBox Control 6.0, and select it. Add the control to Form1.

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

Press F5 to run the project.

RESULTS: The following error appears:

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

Keywords: kberrmsg kbbug kbctrl kbpending kbcode KB191205