Re: Calling function in another dll.

Victor Bazarov <>
Tue, 14 Jul 2009 13:33:56 -0400
jis wrote:

Hi C++ gurus

I have a problem.

But it's not a _C++_ problem. Just so you know...

I am trying to call a function which is in another dll. but i have
problems when i run in release works good in debug mode, iam
using vc++ .

Consider asking in '', then. At least DLLs
are more on topic there.

this is what iam doing

typedef void (CALLBACK *atc_crypt)(double Nbr);

'CALLBACK' is some kind of macro, isn't it? Most likely OS- or
compiler-specific. In that case you need to post to the newsgroup
dedicated to your OS or your compiler.

atc_crypt crypt;

HINSTANCE hDLL = LoadLibrary("D:\\Programs\\crypt.dll");

You don't check the value of 'hDLL' for validity. Why? Are you sure
it's valid?

crypt = GetProcAddress(HMODULE(hDLL ), "atc_crypt");

You don't check the value of 'crypt' for validity. Why?


What is the type of 'Nbr'?

i get exception while running in release mode.

What kind of exception? Try the FAQ, section 5, questions 5.8 and 5.9,
see if they help.

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