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.
MORE INFO chk it :
Code:
http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B177088