How to import a DLL

I have no experience with dynamic link libraries. The examples my book provide use the “#using” keyword.

i.e #using <mscorlib.dll>

I have a .dll used for encrypting the username and password when loging into Yahoo Messenger. I copied the .dll to my project folder and used this code to link it.

Code:

#ifndef __login_h__
#define __login_h__
#using <YMSG12ENCRYPT.DLL>
#endif

Error:

Code:

fatal error C1113: #using failed on 'c:\yahoologinc\ymsg12encrypt.dll

This also don't work

Code:

HMODULE hMod = LoadLibrary("YMSG12ENCRYPT.DLL");

Error:

Code:

error C2664: 'LoadLibraryW' : cannot convert parameter 1 from 'const char [18]' to 'LPCWSTR'

I think the .dll was written in vb.

What am I missing on this?

This is a Unicode problem. Call LoadLibraryA() rather than LoadLibrary().

> This is a Unicode problem. Call LoadLibraryA() rather than LoadLibrary().

Or better yet, use a TEXT or _T macro to transform it to a unicode string literal:

Code:

HMODULE hMod = LoadLibrary(TEXT("YMSG12ENCRYPT.DLL"));

I don't know what your first problem is, though. I think that the #using macro is something from MS Managed C++ or C++/CLI, but I'm not sure.

Yea it is, “VC++.NET How to Program” is an intermediate book on managed C++. Very good book though. I never knew VC++ had a built in garbage collector (__gc) till I bought this book.

The main problem was importing this DLL into my chat client. I found a yahoo login example online and I don’t have the code for the DLL just the login example (Written in VB.NET).

I’m practicing network programming as my summer break project and a simple yahoo chat client would be a fun way to do this.