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Access violation ... in module 'MSVBVM60.DLL'

Posted on 2006-06-25
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Last Modified: 2008-01-09
hi,

i'm trying to use an acitveX from delphi. i didn't write this activeX but i know it was writen in vb6.

i registered this activeX with: regsvr32 "C:\Windows\System32\theActiveX.ocx"
i got : DLLRegisterServer in C:\Windows\System32\theActiveX.ocx succeeded

i tried to install it with: regsvr32 /i "C:\Windows\System32\theActiveX.ocx"
i got: C:\Windows\System32\theActiveX.ocx was loaded, but the DLLInstall entry point was not found. this file cannot be registered.

when i try to execute one of it's method i get the following error:
Access violation at address 6AA5137B in module 'MSVBVM60.DLL'. Read of address 00000020

any another method raised this error:
OLE error 800A01A9

i installed the Service Pack 6 for Visual Basic 6.0: Run-Time Redistribution Pack... with no luck.

any ideas??

thanks,
ewilde.
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Question by:ewilde
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5 Comments
 
LVL 9

Expert Comment

by:justchat_1
ID: 16986830
Are you sure the activex works and that errors were not ignored when it was compiled?
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LVL 5

Author Comment

by:ewilde
ID: 16989626
there is a demo application, written in vb, that uses this activeX, and it works fine.

maybe i should ask this question also in delphi area?
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Accepted Solution

by:
justchat_1 earned 500 total points
ID: 16995251
I can confirm this a delphi problem with activex's...so posting there would probably give a definitive answer...

I read an old forum on this error that mentioned something about having to modify the Delphi wrapper class to use the IDispatch interface instead of the v-table interface but it didnt give details.
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LVL 5

Author Comment

by:ewilde
ID: 17304281
i finally found the solution here:

http://www.x64.com/pt/vbdelphi.html.

the principle for the solution was written by justchat_1, so i finalize this question with grade of B.

i copied the solution from there:

> (the code in the comment was generated by delphi which i replaced)

>    ...
>    FIntf: _UserControl1Disp; {_UserControl1;}
>    function  GetControlInterface: _UserControl1Disp; {_UserControl1;}
>    ...
>    property  ControlInterface: _UserControl1Disp {_UserControl1} read
> GetControlInterface;
>    ....

>    procedure TUserControl1.CreateControl;

>          procedure DoCreate;
>          begin
>            FIntf := IUnknown(OleObject) as _UserControl1Disp;
> {_UserControl1;}
>          end;
>    begin
>          if FIntf = nil then DoCreate;
>    end;

>    function TUserControl1.GetControlInterface: _UserControl1Disp;
> {_UserControl1;}
>    begin
>          CreateControl;
>          Result := FIntf;
>    end;


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