Winforms c# - Set focus to first child control of TabPage

Question

Say I have a Textbox nested within a TabControl.

When the form loads, I would like to focus on that Textbox (by default the focus is set to the TabControl).

Simply calling textbox1.focus() in the Load event of the form does not appear to work.

I have been able to focus it by doing the following:

 private void frmMainLoad(object sender, EventArgs e)
 {
     foreach (TabPage tab in this.tabControl1.TabPages) 
     {
         this.tabControl1.SelectedTab = tab;
     }
 }

My question is:

Is there a more elegant way to do this?

Answer 1

The following is the solution:

private void frmMainLoad(object sender, EventArgs e)
{
    ActiveControl = textBox1;
}

The better question would however be why... I'm not entirely sure what the answer to that one is.

Edit: I suspect it is something to do with the fact that both the form, and the TabControl are containers, but I'm not sure.

Answer 2

Try putting it in the Form_Shown() event. Because it's in a container, putting in the Form_Load or even the Form() constructor won't work.