Because I'm just that bad at programming, I'm trying to complete the following in VB using Visual Studio. Any help would be appreciated. My last programming class ever and just really trying to get through it.

1. Write a program to display 1000 8-character random user IDs in a text box after you click a button. Make sure the program verifies that none of the IDs are identical. Each userid should include a mixture of alphabetic characters and numbers.

2. Write a function that will calculate the area of a sphere and will handle all types of possible errors

Figure the 1st one should be easy enough, I've been researching and working through code trying to get it to work out.