Using a masm dll from VC++ - Forums

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I have tried using Iczelion's dll from his No.17 tutorial (or any other dll) in a VC++ project,

but I am not able to declare the TestHello function or any other function correctly.

The following error message appears:

unresolved external symbol "int __cdecl TestHello(void)" (?TestHello@@YAHXZ)

I have included DllSkeleton.lib in the project so it should have worked.

What do I need to do to use masm dll's with VC++.

Thank you guys.

:grin:

Posted on 2002-05-19 12:12:38 by titanium

Using a masm dll from VC++

There are two problems with your declaration:

1. your code is C++, so the function's symbol name (?TestHello@@YAHXZ) will use C++ name decoration. You need to declare them as C (no ++) functions to get rid of this:
extern "C"
{
... your declarations here ...
}

2. You've declared the function so that it will use the C calling convention (__cdecl by default). Unless you also specified this in your asm source, you need to declare it as STDCALL function:
int __stdcall TestHello(void);

The final declaration will be:

extern "C" int __stdcall TestHello(void);

or:
extern "C"
{
int __stdcall TestHello(void);
... optionally more declares ...
}

Thomas

Posted on 2002-05-19 12:18:10 by Thomas

Using a masm dll from VC++

Thanks it works great.

:) :grin:

Posted on 2002-05-19 15:41:04 by titanium

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