Question

I am using 2 text boxes which will input int digits to max length of 3. How can I pass a mouse pointer from first text box to the second one when 3 digits were entered?

I am trying to do it on TextChange event, but I’m not sure how to check when 3rd digit was checked…

public partial class PingIPRange : Form
{
    public PingIPRange()
    {
        InitializeComponent();

        txtF1.TextChanged += new EventHandler(NextField);
        txtF2.TextChanged += new EventHandler(NextField);
    }

    private void NextField(object sender, EventArgs e)
    {
        // Well, I have no idea how to start with this...
    }
}

Answer 1

Once txtF1.Text.Length == 3, you can use txtF2.Focus() in order to ‘move the cursor’ to the 2nd textbox

EDIT:

private void NextField(object sender, EventArgs e)
{
    if (txtF1.Text.Length == 3) // Textbox contains 3 characters, you DO NEED to validate your input.
        txtF2.Focus();
}