TextBox autocomplete and default buttons

Question

I have a .NET TextBox with AutoComplete feature on the form. The form has also AcceptButton and CancelButton defined. If I try to commit a suggestion with Enter key or close

Answer 1

Another option is to derive your own custom TextBox class that performs validation when Enture/Return is pressed:

public class MyTextBox : TextBox
{
    protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
    {
        if (keyData == Keys.Enter || keyData == Keys.Return)
        {
            // Perform validation here
            return true;
        }
        else
            return false;
    }
}