UserForm Error Message with Comments for Multiple Errors

Is there a way to create a UserForm macro that validates the user input values when the user pushes OK, and then return a list of all the errors?

For example, after pushing OK, a box would pop up and say something like:
"Please correct the following errors:
> error 1
> error 5
> error 9"

I can make several individual error messages, but I was just looking for a more eloquent way to do it. Thanks.