A custom class is one that is written by a programmer for a specific purpose opposed to all the pre-existing classes that come with the .NET framework.
So when I do something like this:
public class MyClass
{
int test;
String whatever;
public MyClass(int i, String s)
{
this.test = i;
this.whatever = s;
}
}
I've created a custom class.
Cheers
Manfred