Reading POSTData from a WebBrowser control

So I have this code, right:

VB Code:

Private Sub WebBrowser1_BeforeNavigate2(ByVal pDisp As Object, URL As Variant, Flags As Variant, TargetFrameName As Variant, PostData As Variant, Headers As Variant, Cancel As Boolean)
If capture.Value = 1 Then
  Text1.Text = Text1.Text & "PostData:" & vbCrLf & PostData
  Cancel = True
End If
End Sub

Basically I want to >READ< the POST Data that is about to be sent while i navigate in a webbrowser control. 'capture' being a checkbox control.

All i get in Text1.Text is "???????????????????????" in different lengths, depending on which site i'm on. I've tried using StrConv(PostData, vbFromUnicode/vbUnicode) but gotten only as far as a 'v'.

And these forms aren't advanced, they have a few <input type=hidden> and a textbox or two, can't be that difficult.

Does anyone know how to make the data READABLE to humans?