Make An INVERTED Triangle With *'s

I am taking an Intro to VB class in college and for on of our assignments we need to make several shapes with *'s. The user is prompted by an input box where they decide how large to make the shapes. The only one that I am struggling with is the inverted triangle. Here is what it should look like if the user would select to have 5 rows.

* * * * *
* * * *
* * *
* *
*

Here is the code that I have written for the REGULAR triangle.

Private Sub btnTriangle_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTriangle.Click
Dim numstars As Integer

[Code].....