dll

this exported works in vb6. it probably works in c++ if <windows.h> is included. is it possible to make it work in c++ Exe without <windows.h>.

Code:

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BSTR __declspec(dllexport) CALLBACK StringTest(BSTR StrVal)
{
        char Str[100];
        //fill Str with StrVal, do other things
        char *Ret = Str;
        return SysAllocString((BSTR)Ret);
}

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Code:

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// Answer is NO, reason is below
// LoadLibrary would be required and that requires <windows.h>

typedef BSTR (APIENTRY * PFN_SysAllocString)(const OLECHAR *);

HANDLE hLibrary = ::LoadLibrary("oleaut32.dll");

if (hLibrary != 0)
{
    PFN_SysAllocString pfnFunc = (PFN_SysAllocString)::GetProcAddress(hLibrary,"SysAllocString"); // "SysAllocStringW" "SysAllocStringA" ?

    if (pfnFunc != 0)
    {
        BSTR bStr = (*pfnFunc)(oleCharPointer);
    }
}

::FreeLibrary(hLibrary);

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