.NET (Core and Framework)

// start file with
using System.Runtime.InteropServices;		// DllImport

// and inside one class, put:

[DllImport("kernel32.dll")]
public static extern int GetDriveType(string rootPathName);

public void CheckAllDrives() 
    foreach(string deviceLetter in Environment.GetLogicalDrives()) {
        if (GetDriveType(deviceLetter)==5) Console.WriteLine(deviceLetter+" is a CD or DVD drive");
    }
}

' start file with
Imports System.Runtime.InteropServices         ' DllImport

' and inside one class, put:

Declare Shared int GetDriveType Lib "kernel32.dll" (ByVal rootPathName As String)

public Sub CheckAllDrives()
    For Each(deviceLetter as String in Environment.GetLogicalDrives())
        if (GetDriveType(deviceLetter) = 5) Console.WriteLine(deviceLetter & " is a CD or DVD drive");
    Next
End Sub

Ryan Minor wrote:

Say you wanted to write an accounting program. The server would run on Windows Server 2008 for example and handle business logic and database access. The client program would have the client forms, etc and obtain data from the server.

Ryan Minor wrote:

Is the server software usually set up as a Windows service normally?

Ryan Minor wrote:

It would listen on certain ports?

Ryan Minor wrote:

How does the server handle multiple concurrent users? I would imagine that after authentication, some sort of thread is created to listen for requests from the user?

I are Troll

cerembeyazit wrote:

I'm writing a application.

this.Location = new Point(x,y);
this.Visible = true;