uploading a file to webserver

You need to use the HttpWebRequest object. I found this code (google is free), but it needs some try/catch stuff put in, and it wouldn't be a bad idea to optimize it a little. You shouldn't have any trouble converting it to VB with one of the many free converters available on the web.

public static  void UploadFilesToRemoteUrl(string url, string[] files, string logpath, NameValueCollection nvc) 
{      
    long length = 0;     
    string boundary = "----------------------------" + DateTime.Now.Ticks.ToString("x");       
    HttpWebRequest httpWebRequest2 = (HttpWebRequest)WebRequest.Create(url);
    httpWebRequest2.ContentType = "multipart/form-data; boundary=" + boundary;
    httpWebRequest2.Method      = "POST";
    httpWebRequest2.KeepAlive   = true; 
    httpWebRequest2.Credentials = System.Net.CredentialCache.DefaultCredentials;    

    Stream memStream = new System.IO.MemoryStream();  
    byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");   
    string formdataTemplate = "\r\n--" + boundary + "\r\nContent-Disposition: form-data; name=\"{0}\";\r\n\r\n{1}";
    foreach (string key in nvc.Keys) 
    {    
        string formitem = string.Format(formdataTemplate, key, nvc[key]); 
        byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem); 
        memStream.Write(formitembytes, 0, formitembytes.Length); 
    } 
    memStream.Write(boundarybytes, 0, boundarybytes.Length);  
    string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n Content-Type: application/octet-stream\r\n\r\n";  
    for (int i = 0; i < files.Length; i++) 
    { 
        //string header = string.Format(headerTemplate, "file" + i, files[i]);  
        string header = string.Format(headerTemplate, "uplTheFile", files[i]);   
        byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);  
        memStream.Write(headerbytes, 0, headerbytes.Length);  
        FileStream fileStream = new FileStream(files[i], FileMode.Open, FileAccess.Read);  
        byte[] buffer = new byte[1024]; 
        int bytesRead = 0;  
        while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)  
        {   
            memStream.Write(buffer, 0, bytesRead);
        } 
        memStream.Write(boundarybytes, 0, boundarybytes.Length); 
        fileStream.Close(); 
    } 
    httpWebRequest2.ContentLength = memStream.Length;  
    Stream requestStream = httpWebRequest2.GetRequestStream();  
    memStream.Position = 0;     
    byte[] tempBuffer = new byte[memStream.Length]; 
    memStream.Read(tempBuffer, 0, tempBuffer.Length); 
    memStream.Close(); 
    requestStream.Write(tempBuffer, 0, tempBuffer.Length); 
    requestStream.Close();   
    WebResponse webResponse2 = httpWebRequest2.GetResponse();  
    Stream stream2 = webResponse2.GetResponseStream(); 
    StreamReader reader2 = new StreamReader(stream2);   
    MessageBox.Show(reader2.ReadToEnd());  
    webResponse2.Close(); 
    httpWebRequest2 = null; 
    webResponse2 = null; 
}

There are a couple of ways to do that.

You can either choose the install a FTP server on the webserver and choose to implement an FTP Client[^] in your software.

You can also add a webservice to your website which accepts file upload.

I recommend using the FTP option if you're able to install a FTP Server since FTP is way better in sending files from one location to another then a webservice is.

Good luck!
Eduard

Use POST with http classes to post the file to a web page which will then
save it to the required location.

this[^] article will guide you. But it is in C#