[VB6] User Validation with VB6 & MySQL...

Hello everyone. Probably a very newbie question, but here goes anyways.

Here is the code I have thus far...

(I know it's not php....only thing available here though...)
Private Sub Command1_Click()
Dim URL As String
Dim Flags As Long
Dim TargetFrame As String
Dim PostData() As Byte
Dim Headers As String
Dim first
Dim last
Dim password
Dim email
Dim viewemail
Dim swingtype
Dim level
Dim validated

URL = "http://links2k3.hostingdog.net/version2/validate.php?first=" + firstname + "&last=" + lastname + "&password=" + password
Flags = 0
TargetFrame = ""

PostData = "Information sent to host"

PostData = StrConv(PostData, vbFromUnicode)

Headers = "Content-Type: application/x-www-form-urlencoded" & _
vbCrLf
WebBrowser1.Navigate URL, Flags, TargetFrame, PostData, Headers

End Sub

What that page does (the http://links2k3.hostingdog.net/version2/validate.php one) is it takes the first, last, and password and checks it against the MySQL Database, then I can return a Y or N on the page....

How do I use that Y or N in the VB Program?

Thanks in advance,

- Troy McCormick