subclassing

If I want to make a subclassing DLL for use in VB, do I just have to make a wrapper for SetWindowLong, like:

Code:

---

#include <windows.h>

int WINAPI DllMain(HINSTANCE, DWORD, PVOID)
{
    return TRUE;
}

extern "C" __declspec(dllexport) LONG CALLBACK VBSetWindowLong(HWND hwnd, UINT offset, LONG dwNewLong)
{
    return SetWindowLong(hwnd, offset, dwNewLong);
}

// Concludes DLL.Standard

---

or do I have to do more than this?

If you want to make a dll now, you better use SetWindowLongPtr.

But basically you're right, except that you don't use the _declspec thing and instead write a .def file.