Question : grabbing text from a string after a logic

I have the following string: "elli-pictures/18.aspx?PGImageID=9058"

how can i code in vb to grab all the information after "PGImageID=".  In this case, i need it to return 9058

Answer : grabbing text from a string after a logic

First:

Dim str As String = "elli-pictures/18.aspx?PGImageID=9058"
Dim strs As String() = str.Split("="c)
Dim number As String = strs(1)
Response.Write(number)