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Q164742: PRB: Error Message Cannot Load 32-bit DLL

Article: Q164742
Product(s): Microsoft FoxPro
Version(s): 3.0 3.0b 5.0 6.0
Operating System(s): 
Keyword(s): kbprogramming kbtool kbvfp kbvfp300 kbvfp300b kbvfp500 kbvfp600
Last Modified: 21-AUG-1999

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The information in this article applies to:

- Microsoft Visual FoxPro for Windows, versions 3.0, 3.0b, 5.0, 6.0 
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SYMPTOMS
========

The following error occurs when you attempt to call a function in a 16-bit DLL
that has been registered with the DECLARE-DLL command:

  Cannot load 32-bit DLL <path to DLL>

It may also seem to happen in calling the RegFn() function in FoxTools, if the
incorrect syntax is used, after having registered the function with the
DECLARE-DLL command.

STATUS
======

This behavior is by design. The DECLARE-DLL command should only be used to
register 32-bit DLL functions in FoxPro. To register a function of a 16- bit
DLL, use the RegFn function of the FoxTools.FLL library.


MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

The following steps are for illustration purposes only -- the DLL in the example
does not exist.

Type the following commands in the command window:

     DECLARE INTEGER TestFn IN Test16.dll INTEGER,INTEGER
     *** The error will occur on executing the next line of code
     ? TestFn(1,1)
     *** Removing the asterisk on the next line would resolve the error
     *** that occurs on the first RegFn() call below.
     * CLEAR DLLS

     SET LIBRARY TO HOME()+"FoxTools.FLL"
     *** The error will occur on executing the next line of code
     *** because it is attempting to call the TestFn() function registered
     *** above with the DECLARE-DLL command
     handle = RegFn(TestFn(),"II","I","Test16.DLL")
     * The correct way to register the function is...
     handle = RegFn("TestFn","II","I","Test16.DLL")
     ReturnValue = CallFn(handle, 1, 1)  && Note this works now

Additional query words:

======================================================================
Keywords          : kbprogramming kbtool kbvfp kbvfp300 kbvfp300b kbvfp500 kbvfp600 
Technology        : kbVFPsearch kbAudDeveloper kbVFP300 kbVFP300b kbVFP500 kbVFP600
Version           : 3.0 3.0b 5.0 6.0
Issue type        : kbprb

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