Problem calling dll function with Visual Basic

Rick · Joined: 04 Oct 2007 Posts: 3

I'm using Access Visual Basic.
When trying to call this function within its class module:
Declare Function DAZOptions Lib "emdaz32.dll" (ByVal lngHandle As Long)
As Long

I receive the following error:
Run time error '53':
File not found: emdaz32.dll

My code and this function worked perfectly with Windows XP but now fails
after upgrading to Windows Vista 64-bit.

The file emdaz32.dll IS contained in the folder C:\Windows\System32\.

Even if I declare the function using the full path to the dll file as shown
below:
Declare Function DAZOptions Lib " C:\Windows\System32\emdaz32.dll"
(ByVal lngHandle As Long) As Long

I still receive the same error message just showing the full path:
Run time error '53':
File not found: C:\Windows\System32\emdaz32.dll

I don't understand why "File not found" error is returned when the file is
there.
Is there something different I have to do to call a 32-bit dll when using
Windows Vista 64-bit version? My other 32-bit applications are working
properly.

I will GREATLY appreciate any assistance anyone can offer. This has me
really stumped and frustrated.

Archived from group: microsoft>public>access>modulescoding

Stefan Hoffmann · Joined: 04 Oct 2007 Posts: 2

hi Rick,

Rick wrote:
> The file emdaz32.dll IS contained in the folder C:\Windows\System32\.
How did you install it in this folder? Maybe you are running in on of
the security measures of Vista.

Try moving the dll to a folder where you have full access, e.g.
%USERPROFILE%.

mfG
--> stefan <--

little ole me · Joined: 04 Oct 2007 Posts: 1

Have you registered this dll (under references)?

"Rick" wrote:

> I'm using Access Visual Basic.
> When trying to call this function within its class module:
> Declare Function DAZOptions Lib "emdaz32.dll" (ByVal lngHandle As Long)
> As Long
>
> I receive the following error:
> Run time error '53':
> File not found: emdaz32.dll
>
> My code and this function worked perfectly with Windows XP but now fails
> after upgrading to Windows Vista 64-bit.
>
> The file emdaz32.dll IS contained in the folder C:\Windows\System32\.
>
> Even if I declare the function using the full path to the dll file as shown
> below:
> Declare Function DAZOptions Lib " C:\Windows\System32\emdaz32.dll"
> (ByVal lngHandle As Long) As Long
>
> I still receive the same error message just showing the full path:
> Run time error '53':
> File not found: C:\Windows\System32\emdaz32.dll
>
> I don't understand why "File not found" error is returned when the file is
> there.
> Is there something different I have to do to call a 32-bit dll when using
> Windows Vista 64-bit version? My other 32-bit applications are working
> properly.
>
> I will GREATLY appreciate any assistance anyone can offer. This has me
> really stumped and frustrated.
>
>
>
>
>
>

Sinna · Joined: 04 Oct 2007 Posts: 191

little ole me wrote:
> Have you registered this dll (under references)?
>

This dll shouldn't be registered as it is a Windows DLL, not an ActiveX
DLL (seen the calling convention used).

Sinna

Rick · Joined: 04 Oct 2007 Posts: 3

Stefan,

I think that is indeed my problem. I moved the dll file to a "Temp" folder
inside my "Documents" folder and changed the Declaration as follows:
Declare Function DAZOptions Lib "
C:\Users\Rick\Documents\Temp\emdaz32.dll" (ByVal lngHandle As Long) As Long

I no longer get the error message that THIS dll can't be found, however, I
get an error message that emlcns32.dll can't be found. This is a dll which
is called from within the emdaz32.dll and there's no reference to it in my
VB code. The emlcns32.dll file is contained both within my new "Temp"
folder along with the emdaz32.dll and in the "C:\Windows\System32" folder.

Apparently I'm going to have to give this Access project permission to
access the "C:\Windows\System32" folder where all the 32-bit system dll
files are normally located.

Does anyone have an idea how to accomplish this?

Thanks so much for your help?

Rick

"Stefan Hoffmann" wrote in message @TK2MSFTNGP05.phx.gbl...
> hi Rick,
>
> Rick wrote:
>> The file emdaz32.dll IS contained in the folder C:\Windows\System32\.
> How did you install it in this folder? Maybe you are running in on of the
> security measures of Vista.
>
> Try moving the dll to a folder where you have full access, e.g.
> %USERPROFILE%.
>
>
> mfG
> --> stefan <--

Arjan · Joined: 04 Oct 2007 Posts: 1

Hi Rick,

You could try to place the DLL files that are being used (emdaz32.dll and
emlcns32.dll) in the same folder as the Access database/application is in and
reference the DLL without the complete path to it as you did before.

--Arjan

"Rick" wrote:

> Stefan,
>
> I think that is indeed my problem. I moved the dll file to a "Temp" folder
> inside my "Documents" folder and changed the Declaration as follows:
> Declare Function DAZOptions Lib "
> C:\Users\Rick\Documents\Temp\emdaz32.dll" (ByVal lngHandle As Long) As Long
>
> I no longer get the error message that THIS dll can't be found, however, I
> get an error message that emlcns32.dll can't be found. This is a dll which
> is called from within the emdaz32.dll and there's no reference to it in my
> VB code. The emlcns32.dll file is contained both within my new "Temp"
> folder along with the emdaz32.dll and in the "C:\Windows\System32" folder.
>
> Apparently I'm going to have to give this Access project permission to
> access the "C:\Windows\System32" folder where all the 32-bit system dll
> files are normally located.
>
> Does anyone have an idea how to accomplish this?
>
> Thanks so much for your help?
>
> Rick
>
>
> "Stefan Hoffmann" wrote in message
> @TK2MSFTNGP05.phx.gbl...
> > hi Rick,
> >
> > Rick wrote:
> >> The file emdaz32.dll IS contained in the folder C:\Windows\System32\.
> > How did you install it in this folder? Maybe you are running in on of the
> > security measures of Vista.
> >
> > Try moving the dll to a folder where you have full access, e.g.
> > %USERPROFILE%.
> >
> >
> > mfG
> > --> stefan <--

Rick · Joined: 04 Oct 2007 Posts: 3

Thanks for the suggestion, but it made no difference.
With no full path provided it's attempting to access the dll files in the
"C:\Windows\System32 folder"

If I provide a full path for the first dll file referenced from my VB code I
can access it (if the folder is within my "Documents" folder) but the second
dll file which is called from the first is always going to be looked for in
the "C:\Windows\System32 folder"

Rick

"Arjan" wrote in message @microsoft.com...
> Hi Rick,
>
> You could try to place the DLL files that are being used (emdaz32.dll and
> emlcns32.dll) in the same folder as the Access database/application is in
> and
> reference the DLL without the complete path to it as you did before.
>
> --Arjan
>
> "Rick" wrote:
>
>> Stefan,
>>
>> I think that is indeed my problem. I moved the dll file to a "Temp"
>> folder
>> inside my "Documents" folder and changed the Declaration as follows:
>> Declare Function DAZOptions Lib "
>> C:\Users\Rick\Documents\Temp\emdaz32.dll" (ByVal lngHandle As Long) As
>> Long
>>
>> I no longer get the error message that THIS dll can't be found, however,
>> I
>> get an error message that emlcns32.dll can't be found. This is a dll
>> which
>> is called from within the emdaz32.dll and there's no reference to it in
>> my
>> VB code. The emlcns32.dll file is contained both within my new "Temp"
>> folder along with the emdaz32.dll and in the "C:\Windows\System32"
>> folder.
>>
>> Apparently I'm going to have to give this Access project permission to
>> access the "C:\Windows\System32" folder where all the 32-bit system dll
>> files are normally located.
>>
>> Does anyone have an idea how to accomplish this?
>>
>> Thanks so much for your help?
>>
>> Rick
>>
>>
>> "Stefan Hoffmann" wrote in message
>> @TK2MSFTNGP05.phx.gbl...
>> > hi Rick,
>> >
>> > Rick wrote:
>> >> The file emdaz32.dll IS contained in the folder C:\Windows\System32\.
>> > How did you install it in this folder? Maybe you are running in on of
>> > the
>> > security measures of Vista.
>> >
>> > Try moving the dll to a folder where you have full access, e.g.
>> > %USERPROFILE%.
>> >
>> >
>> > mfG
>> > --> stefan <--
>

Stefan Hoffmann · Joined: 04 Oct 2007 Posts: 2

hi Rick,

Rick wrote:
> I no longer get the error message that THIS dll can't be found, however,
> I get an error message that emlcns32.dll can't be found. This is a dll
> which is called from within the emdaz32.dll and there's no reference to
> it in my VB code. The emlcns32.dll file is contained both within my new
> "Temp" folder along with the emdaz32.dll and in the
> "C:\Windows\System32" folder.
Then there is a hardcoded path in this DLL, which I would consider a bug.

> Apparently I'm going to have to give this Access project permission to
> access the "C:\Windows\System32" folder where all the 32-bit system dll
> files are normally located.
I'm not sure whether you're DLLs run in the Virtual Store or not. This
may be a problem.

But you may give ProcessMonitor/ProcessExplorer a chance.

mfG
--> stefan <--

DAVID · Joined: 04 Oct 2007 Posts: 1

> The file emdaz32.dll IS contained in the
> folder C:\Windows\System32\.

Are you sure? Windows Vista has the power to
emulate the system32 folder, so that 32 bit
programs which think they need to write to
that folder can do so. Of course, other people
who look in that folder won't see any changes.

(david)

Rick wrote:
> I'm using Access Visual Basic.
> When trying to call this function within its class module:
> Declare Function DAZOptions Lib "emdaz32.dll" (ByVal lngHandle As
> Long) As Long
>
> I receive the following error:
> Run time error '53':
> File not found: emdaz32.dll
>
> My code and this function worked perfectly with Windows XP but now fails
> after upgrading to Windows Vista 64-bit.
>
> The file emdaz32.dll IS contained in the folder C:\Windows\System32\.
>
> Even if I declare the function using the full path to the dll file as
> shown below:
> Declare Function DAZOptions Lib " C:\Windows\System32\emdaz32.dll"
> (ByVal lngHandle As Long) As Long
>
> I still receive the same error message just showing the full path:
> Run time error '53':
> File not found: C:\Windows\System32\emdaz32.dll
>
> I don't understand why "File not found" error is returned when the file
> is there.
> Is there something different I have to do to call a 32-bit dll when
> using Windows Vista 64-bit version? My other 32-bit applications are
> working properly.
>
> I will GREATLY appreciate any assistance anyone can offer. This has me
> really stumped and frustrated.
>
>
>
>
>

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