Creating 64-bit interop dlls from an ActiveX component

Hi there,

I have generated a 64-bit version of an old ActiveX component. I now need to create the appropriate interop dlls to be able to use this component from some managed code. Here's what I've tried:

> tlbimp myDll.ocx /out:myDllInterop.dll /machine:x64

This generates the error:

TlbImp : error TI0000 : A single valid machine type compatible with the input type library must be specified

From this error, it appears that I might not have a 64-bit activeX component. But when I check it using DependencyWalker, it says it IS a 64-bit dll. Is it possible that the typelib info inside the ocx is only 32-bits. If so, how can I verify that OleView doesn't give me enough info about the bit-ness of the tlb. And more importantly, how can I force a 64-bit typelib info to be embedded inside the ActiveX control

I've also tried aximp, but it doesn't seem to have any option to specify a target machine type at all

Do I have to write my own tlbimp/aximp using the TypeLibConverter class Can anyone point me in the right direction please
Thanks
Ahsan

.NET Development31

...
Hi there,

I have generated a 64-bit version of an old ActiveX component. I now need to create the appropriate interop dlls to be able to use this component from some managed code. Here's what I've tried:

> tlbimp myDll.ocx /out:myDllInterop.dll /machine:x64

This generates the error:

TlbImp : error TI0000 : A single valid machine type compatible with the input type library must be specified

From this error, it appears that I might not have a 64-bit activeX component. But when I check it using DependencyWalker, it says it IS a 64-bit dll. Is it possible that the typelib info inside the ocx is only 32-bits. If so, how can I verify that OleView doesn't give me enough info about the bit-ness of the tlb. And more importantly, how can I force a 64-bit typelib info to be embedded inside the ActiveX control

I've also tried aximp, but it doesn't seem to have any option to specify a target machine type at all

Do I have to write my own tlbimp/aximp using the TypeLibConverter class Can anyone point me in the right direction please
Thanks
Ahsan

Are you sure you run the 64bit version of tlbimp

Willy.

Hi Willy,

I've tried both versions of tlbimp that are installed on my m/c
C:\Program Files (x86)\Microsoft Visual Studio 8\SDK\v2.0\bin\tlbimp.exe
C:\Program Files\Microsoft.Net\SDK\v2.0 64bit\Bin\tlbimp.exe

They both result in the same error message.
BTW, I'm running on XP x64 (in case it matters)
Thanks
Ahsan