Question

We have an application that uses a dual monitor setup – User A will work with Monitor 1, and user B will work with Monitor 2 simultaneously. Monitor 2 is a touch screen device.

Now, the problem is, when User A types something in his screen, if User B tries to do something, User A will end up in losing the focus from his window, which is disastrous.

What might be a good solution to preserve the focus on the window in Monitor 1, even if User B do something with Monitor 2?

Answer 1

It is possible with some elbow grease. Paste this code in the form that you show on the touch screen:

protected override CreateParams CreateParams {   get {     const int WS_EX_NOACTIVATE = 0x08000000;     CreateParams param = base.CreateParams;     param.ExStyle |= WS_EX_NOACTIVATE;     return param;   } } 

That makes sure that the form won’t steal the focus from the main form. Make it look like this:

  public partial class Form1 : Form {     public Form1() {       InitializeComponent();       Thread t = new Thread(SecondMonitor);       t.IsBackground = true;       t.SetApartmentState(ApartmentState.STA);       t.Start();     }     private void SecondMonitor() {       Form2 f2 = new Form2();       f2.StartPosition = FormStartPosition.Manual;       f2.Left = 800;   // Use Screen class here...       f2.ShowDialog();     }