DOCUMENT:Q177088  11-JAN-2001  [vbwin]
TITLE   :BUG: Run-Time Error 380 "Invalid Property Value" with MaskEdBox
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:
OPER/SYS:
KEYWORDS:kbGrpDSVB

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-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Visual Basic Professional Edition for Windows, versions 4.0, 5.0 
 - Microsoft Visual Basic Enterprise Edition for Windows, versions 4.0, 5.0 
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SYMPTOMS
========

With Microsoft Visual Basic 4.0, when you set the Text property of a Mask Edit
control at run-time, you receive the following error.

   Run-time Error 380:
   Invalid Property Value

CAUSE
=====

This error occurs under the following circumstances:

 - The Visible property of the Mask Edit control is set to False at
   design-time.

   -and-

 - A later version of MSMASK32.OCX is installed. The error occurs with
   MSMASK32.OCX version 5.00.3714, which ships with Microsoft Visual Basic 5.0.

RESOLUTION
==========

To work around this problem, set the Visible property of the Mask Edit control
to True at design-time and then change it to False at run-time, perhaps during
the Load event of the form.

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. Start a new project in Visual Basic 4.0. Form1 is created by default.

2. Click Custom Controls on the Tools menu, and check "Microsoft Mask Edit
   Control."

3. Add a Mask Edit control to Form1, and set the following properties for the
   control:

   Property                 Value
   --------                 -----
   Visible                  False
   Mask                     &-&

4. Add the following code to the Click event of Form1.

         MaskEdBox1.Text = " - "
         MaskEdBox1.Visible = True

5. Press the F5 key to run the project.

6. Click the Form and note that the code should run as expected.

7. Click Make EXE on the File menu, and make an executable.

8. At a machine where Visual Basic 5.0 is installed, run the executable you
   created in the previous step.

   NOTE: If you receive an error that VB40032.DLL cannot be found when you run
   the executable, you will need to copy VB40032.DLL to the Windows\System
   directory.

9. Click the form. You will receive the run-time error 380 "Invalid Property
   Value" when your code attempts to set the Text property of the MaskEdBox.

Additional query words: masked edit box editbox kbVBp400bug kbVBp500bug kbVBp kbdsd 
kbDSupport kbnoupdate

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Keywords          : kbGrpDSVB 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB500Search kbVBA500 kbVB500 kbVB400Search kbVB400
Issue type        : kbbug

=============================================================================

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