Detect current active components? [Resolved]

I have 2 components: a TreeView and a ListBox in a form.

How can I detect (using VB .NET code)which component is the one I'm currently working on?

Please guide. Thank you.

The code is in C#, so if you need help converting it, let me know:

Code:

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private void button1_Click(object sender, System.EventArgs e) {
    foreach (Control c in this.Controls) {
        if (c.Focused) {
            MessageBox.Show("Name: " + c.Name + " Has Focus.");
            return;
        }
    }
}

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