Code to upload zip file from local pc to desired URL

I'm using VB.NET 2005, Framework 2.0 to develop a Windows Application and not web application

I need to upload a zip file from local PC to a desired URL with the following syntax

http://localhost:xxxx/tsc/WOSync.do?action=upload&mkey=xxxx&wo[0]=<file>

How can I do it? The syntax is from a vendor who developed the web app in java.

This piece of code is in vb6 works, how to convert to vb.net

'Create an instance of the WinHttpRequest object

Set WinHttpReq = New WinHttpRequest

'Hard coded URL that HTTP Request will be performed

'strURL = "http://localhost/retail/eod.do?action=submit"

'Set the zip file's path name

StrFileName = App.Path & "\ddmmmyyy.zip"

'Grap the file

nFile = FreeFile

Open StrFileName For Binary As #nFile

strFile = String(LOF(nFile), " ")

Get #nFile, , strFile

Close #nFile

'Assemble an HTTP request.

WinHttpReq.Open "POST", strURL, False

'Set the header

WinHttpReq.setRequestHeader "Content-Type", "multipart/form-data; boundary=Xu02=$"

'Assemble the body

strBody = "--Xu02=$" & vbCrLf & _

"Content-Disposition: form-data; name=""file""; filename=""" & StrFileName & """" & vbCrLf & _

"Content-type: file" & vbCrLf & vbCrLf & _

strFile & vbCrLf & _

"--Xu02=$--"

'Because of binary zeros, post body has to convert to byte array

aPostBody = StrConv(strBody, vbFromUnicode)

'Send the HTTP Request.

WinHttpReq.send aPostBody