Wilson,

>Is there a way to instanciate a class from a string.

Yes, you need to use reflection. Here's an example:

string DLLName = "MyDLL";
string ClassName = "MyClass";
System.Reflection.Assembly oDLL;
object oClass;

// This "loads" the .DLL
oDLL = System.Reflection.Assembly.LoadFrom(DLLName);

// This creates the class instance
oClass = oDLL.CreateInstance(ClassName);

Sorry it's in C# instead of VB, but you can go to either
http://authors.aspalliance.com/aldotnet/examples/translate.aspx
or
http://www.kamalpatel.net/ConvertCSharp2VB.aspx
to convert it to VB.

~~Bonnie