PRB: File Does Not Appear to Be a Valid OLE Control

 Last reviewed: February 29, 1996
Article ID: Q138437
The information in this article applies to:
  • Microsoft Visual FoxPro for Windows, version 3.0

SYMPTOMS

When you use Accusoft's Image Format Library .OCX with Visual FoxPro and attempt to register added controls, you receive this error: 

   The file does not appear to be a valid OLE control
After you clear the first error message, you may receive this additional error message: 

   Unable to register the OLE control.
Using this .OCX control in Microsoft Visual C++ or Microsoft Access works fine.

Accusoft's Image Control Library .OCX is manufactured by Accusoft, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.

CAUSE

Accusoft's Image Control Library .OCX is a 16-bit .OCX rather than a 32-bit OCX. Accusoft has also released a 32-bit version of this library. For more information about this control, you can contact Accusoft at (508) 898-2770.

RESOLUTION

There are three requirements for an .OCX to work correctly with Visual FoxPro:

  • The OCX control must be 32-bit.
  • A control which supports data binding will not be able to bind to a Visual FoxPro field or table.
  • Visual FoxPro does not support the ISimpleFrameSite interface. Controls which use this interface may have limited functionality within Visual FoxPro.

STATUS

This behavior is by design.

Additional reference words: 3.00 VFoxWin
KBCategory: kb3rdparty kbole kbprb
KBSubcategory: FxinteropOcx

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Last reviewed: February 29, 1996
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