Question from Newbie: I want to create a DLL called AddOne.DLL that has one function in it called "OneMore" that accepts an integer as input and returns the next greatest integer value (ie: if i pass it 212, i want it to return 213). I then want to call this from a windows forms application. My question is: 1) how do i create a function that returns a value. 2) how do i call this external function from another C# windows forms app. This is probably the dumbest question ever posted, but i am an old VB programmer and all this is new to me.