public SendMessageWindow(RemoteLogonSession windowsUser)
{
InitializeComponent();
// Set initial focus to text box.
Loaded += (sender, e) =>
MoveFocus(new TraversalRequest(FocusNavigationDirection.Next));
_WindowsUser = windowsUser;
tbBody.Text = $"Enter a message for {windowsUser.Username} on {RemoteLogonSession.ComputerName}.";
}
public static List <RemoteLogonSession> GetWindowsUsers(IntPtr server)
{
var windowsUsers = new List <RemoteLogonSession>();
IntPtr buffer = IntPtr.Zero;
int count = 0;
try
{
int retval = WTSEnumerateSessions(server, 0, 1, ref buffer, ref count);
int dataSize = Marshal.SizeOf(typeof(WTS_SESSION_INFO));
Int64 current = (int)buffer;
if (retval != 0)
{
for (int i = 0; i < count; i++)
{
var windowsUser = new RemoteLogonSession();
var bufferTwo = IntPtr.Zero;
uint bytesReturned = 0;
WTS_SESSION_INFO si = (WTS_SESSION_INFO)Marshal.PtrToStructure((IntPtr)current, typeof(WTS_SESSION_INFO));
current += dataSize;
windowsUser.SessionId = Convert.ToUInt32(si.SessionID);
try
{
// Get the username of the Terminal Services user.
if (WTSQuerySessionInformation(server, si.SessionID, WTS_INFO_CLASS.WTSUserName, out buffer, out bytesReturned) == true)
{
windowsUser.Username = Marshal.PtrToStringAnsi(buffer).Trim();
}
if (string.IsNullOrWhiteSpace(windowsUser.Username))
{
continue;
}
// Get the connection state of the Terminal Services user.
if (si.State == WTS_CONNECTSTATE_CLASS.WTSDisconnected)
{
windowsUser.IsDisconnected = true;
}
// Get the IP address of the Terminal Services user.
if (WTSQuerySessionInformation(server, si.SessionID, WTS_INFO_CLASS.WTSClientAddress, out buffer, out bytesReturned) == true)
{
var clientAddress = new WTS_CLIENT_ADDRESS();
clientAddress = (WTS_CLIENT_ADDRESS)Marshal.PtrToStructure(buffer, clientAddress.GetType());
windowsUser.IpAddress = clientAddress.Address[2] + "." + clientAddress.Address[3] + "." + clientAddress.Address[4] + "." + clientAddress.Address[5];
}
windowsUsers.Add(windowsUser);
}
finally
{
WTSFreeMemory(bufferTwo);
}
}
}
}
finally
{
WTSFreeMemory(buffer);
}
return(windowsUsers);
}
private void bgThread_LogoffUser(object sender, DoWorkEventArgs e)
{
// Background thread to logoff a user.
e.Result = RemoteLogonSession.LogoffUser(e.Argument as RemoteLogonSession);
}
private void bgThread_GetLogonSessions(object sender, DoWorkEventArgs e)
{
e.Result = RemoteLogonSession.GetLogonSessions();
}
