Microsoft KB Archive/213717

= XL2000: Run-Time Error Using the DropDown Method with a ComboBox =

Article ID: 213717

Article Last Modified on 11/23/2006

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APPLIES TO


 * Microsoft Excel 2000 Standard Edition

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This article was previously published under Q213717





SYMPTOMS
When you use the DropDown method in a Microsoft Visual Basic for Applications procedure to display the list of a combo box, you may receive an error message similar to the following:

Run-time error'-2147417848(80010108)':

Automation error

Connection to type library or object library for remote process has been lost. Press OK for dialog to remove reference.



CAUSE
This behavior can occur when the following conditions are true:
 * You have a Visual Basic procedure attached to the Click event or the Change event of a ComboBox control in a UserForm.

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 * The Visual Basic procedure attempts to set the focus to, and then display the list of, another ComboBox control on the UserForm.



WORKAROUND
Microsoft provides programming examples for illustration only, without warranty either expressed or implied, including, but not limited to, the implied warranties of merchantability and/or fitness for a particular purpose. This article assumes that you are familiar with the programming language being demonstrated and the tools used to create and debug procedures. Microsoft support professionals can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific needs. If you have limited programming experience, you may want to contact a Microsoft Certified Partner or the Microsoft fee-based consulting line at (800) 936-5200. For more information about Microsoft Certified Partners, please visit the following Microsoft Web site:

https://partner.microsoft.com/global/30000104

For more information about the support options that are available and about how to contact Microsoft, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

The following example illustrates how to display the list of one ComboBox control when you make a choice in the list of another ComboBox control on a UserForm.

Populate the ListBox Directly from Worksheet Cells
 Close and save any open workbooks, and then open a new workbook.  On Sheet1, type the following values:   A1: Planes        C1: Alpha A2: Trains       C2: Bravo A3: Automobiles  C3: Charlie  Start the Visual Basic Editor (press ALT+F11). If the Properties window is not visible, click Properties Window on the View menu (or press F4). On the Insert menu, click Module.</li>  In the module sheet, type the following procedure: Sub DropDown_ComboBox UserForm1.ComboBox2.DropDown End Sub </li> On the Insert menu, click UserForm.</li> Draw a ComboBox control on the UserForm.</li>  Change the following properties of the ComboBox control to the following values: <pre class="fixed_text">  Property          Value --  RowSource         Sheet1!A1:A3 </li> Double-click the ComboBox to open the code window.</li>  In the module, type the following code for the ComboBox Click event: Private Sub ComboBox1_Click Application.OnTime Now, "DropDown_ComboBox" End Sub </li> Draw another ComboBox control on the UserForm.</li>  Change the following properties of the ComboBox control to the following values: <pre class="fixed_text">  Property          Value --  RowSource         Sheet1!C1:C3 </li> Run the UserForm.</li></ol>

When you click an item in the ComboBox1 list, the ComboBox2 list is automatically displayed.

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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

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