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POcan I mix __cdecl export calls with __stdcall import calls in a DLL?
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copied!<p>I am writing a module for a third party application; the application <code>uses __cdecl</code> calling convention. </p> <p>At the same time, I have a legacy DLL which <code>uses __stdcall</code> calling convention.</p> <p>Can I create a wrapper that in one end <code>exports __cdecl</code> functions, while in the other end <code>imports __stdcall</code> functions? which other options do I have?</p> <p>Thanks,</p> <p>EDIT:</p> <p>Here is some extra information that my help clarify my situation.</p> <p>There is a <code>third_party.exe</code> that need to gain access to <code>skeleton.dll</code>. The source code skeleton.dll contains the header file below and compiles using __cdecl.</p> <pre><code>#ifdef _EXPORTING #define DECLSPEC __declspec(dllexport) #else #define DECLSPEC __declspec(dllimport) #endif #ifdef __cplusplus extern "C" { #endif DECLSPEC int ICD_Create(char* id); ... ... ... </code></pre> <p>Ideally, I would use the skeleton source code to develop my DLL; unfortunately, it would be too time consuming to port my current VB6 legacy code into C++. Given this, I had to hack my VB6 code by following <a href="http://www.google.com/url?sa=t&source=web&cd=2&ved=0CCEQFjAB&url=http://filedb.experts-exchange.com/incoming/2011/04_w16/443022/VB6-Library-Guide-Rev1.pdf&rct=j&q=building%20shared%20libraries%20with%20vb6&ei=2FQ4TrOCFabe0QHyxq3eAw&usg=AFQjCNG1UZrN37UPFIKboP0W4zKul-6CJQ&cad=rja" rel="nofollow">this guideline</a> (It is a work around, but it allows me to use an ActiveX DLL as a standard C DLL). </p> <p>I am not 100% confident of the modified VB6 calling convention, nor how to modify it. The exercises use __stdcall, and there seem to work fine with a test application I developed. However, when I test it with the third party application, it calls properly certain functions but in other functions it crashes.</p> <p>The architecture would look like:</p> <pre><code>Application: ThirdParty.exe (out of your control: Uses __cdecl) | | Plugin module: Skeleton.dll (your code) | | Legacy DLL: ModifiedVB6.dll (out of your control: Seem to work with __stdcall) </code></pre> <p>The legacy DLL generates a dll, lib and def file; No header file.</p>

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