CoreLab.MySql.dll

[theud]

I had add the line #using "c:\Program Files\CoreLab\MySQLDirect.Net\CoreLab.MySQL.dll" in my VC++.net program to read a database and copy this file in the folder of my project, but then i have a lot of error, because the commands mysql such as MySqlConnection are not understood by the compilator. So it means apparently that the file "CoreLab.MySQL.dll" is not link to the project... Could anyone explain that to me ?