then how do I do this??

from the book i'm reading:

"If you expect the user to enter an integer, you can test with VarType() to see if the argument is a valid integer."

So how do I test the user's entry with VarType? i need a complete but simple sample code which I can actually use in an application. How do I test with VarType to see if the user's entry is a valid integer?.....I know i can use other functions like IsDate, IsNumeric, etc. but I also want to know how to use VarType. Thanks!