how to call same method name from defferent vc++ dll in vb.net

Question

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VS2008

I have two dll
1.hello.dll
2.hellox64.dll

both the dll are same but except in platform.
I want to call the same function from the both dll's according to plateform(x86 & x64)
vb.net code

VB

If (IntPtr.Size = "8") Then
                rc = ABCx64(parameters)
            Else
                rc = ABC(parameters)

And calling code like

VB

Public Declare Function ABC Lib "hello" (ByVal parameters As Integer) As IntPtr

Public Declare Function ABCx64 Lib "hellox64" Alias "ABC" (ByVal parameters As Integer) As IntPtr

The problem is it is work fine in x86 bit but not calling for x64 bit,error is ABCx64 is not find

Posted 8-Dec-11 3:22am

Member 7909353

Updated 8-Dec-11 3:57am

v2

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Comments

Albert Holguin 8-Dec-11 9:31am

Well, don't know about VB.net, but I'm pretty sure this isn't supported in C++ (having the same export function name in a statically linked dll). What ends up happening is only one function gets mapped by the linker to that location. Not completely sure though, that's why I'm posting as comment and not solution.

If you want two functions with the same name on two dlls, you'd have to link the dll dynamically at run-time (again, not sure how this works on VB.net).

Richard MacCutchan 8-Dec-11 10:03am

Check the exported name from your 64 bit dll, and also that the dll itself is located in the correct place for the loader.

Sergey Alexandrovich Kryukov 8-Dec-11 11:15am

Change one of your tags, the one misleading the readers! It cannot be C++, this is C++/CLI.
--SA

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coded007 · Answer 1 · 2011-12-08T14:42:00

Solution 1

Hope this will help you http://bytes.com/topic/net/answers/658235-call-visual-c-dll-using-vb-net

Posted 8-Dec-11 14:42pm

coded007

Comments

Member 7909353 8-Dec-11 23:49pm

I have done in .def file

EXPORTS
ABC @12
ABCx64 @13

Richard MacCutchan 9-Dec-11 5:22am

You cannot export the 64 bit and 32 bit methods from the same dll.