Check if Cursor is in groupBox1 or groupBox2 C#

Question

i have 2 groupBoxes, both with one TextBox and one Button.

When i am in groupBox1 and write something in textBox1 and i Press the Enter Button, the Button in groupBox1 should be pushed, same Thing when i am in groupBox2 and write something there in textBox2.

Something like

if (Focus is on groupbox1 == true)
    this.AcceptButton = button1;
else if(Focus is on groupbox2 == true)
    this.AcceptButton = button2;

Answer 1

Use the enter event for toggling the focus

private void textBox1_Enter(object sender, EventArgs e)
{
    AcceptButton = button1;
}
private void textBox2_Enter(object sender, EventArgs e)
{
    AcceptButton = button2;
}
private void button1_Click(object sender, EventArgs e)
{
    MessageBox.Show("First button clicked");
}
private void button2_Click(object sender, EventArgs e)
{
    MessageBox.Show("Second button clicked ");
}

Answer 2

You can subscribe on TextBox KeyDown event:

TextBox tb = new TextBox();
tb.KeyDown += new KeyEventHandler(tb_KeyDown);

static void tb_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Enter)
    {
        //enter key is down
    }
}