>In the same class, I created a private method. Then, I overloaded the method so it could also accept a different type for the parameter. So, the first declaration accepts an integer. The overaload declaration accepts a string. When running the application, I got an error telling me that the method was not found. I had to make them Public so to have it work. Why is that?

From your description:

Class SomeClass
	Private Sub Test()
		DoSomething("Hello")
		DoSomething(3)
	End Sub

	Private Sub DoSomething(s As String)
	End Sub
	Private Sub DoSomething(i As Integer)
	End Sub
End Class

What doesn'r work ?