Open an PDF Document from Vb.Net application

If you want to open file in WinForm than you can use Adobe PDF Reader control from COM Component.
[Edit]
For Windows Form you have to place Adobe PDF Reader Control on you form and just pass the file path as its source.

AdobeReader.src = "C:\mydoc.pdf"

And if you dont want to use this control than just check this out..

PDF Viewer Control Without Acrobat Reader Installed[^]
[/edit]
Or, if you want to open PDF file in Adobe Reader Application than just use Process.Start() method like this:

Process myProcess = new Process();

           try
           {
         
               myProcess.StartInfo.FileName = "C:\\myPDF.pdf";
               myProcess.StartInfo.CreateNoWindow = true;
               myProcess.Start();

           }
           catch (Exception e)
           {
               MessageBox.Show(e.Message);
           }