I would like to have the characters in a combo box converted to upper case as the user types them. So for instance, when a user types 'a' in the text area, it would be converted to 'A'. 
I've tried: 
private void cmbList_KeyDown(object sender, KeyEventArgs e) 
{ 
cmbList.Text.ToUpper(); 
} 
Also, is there a way to have the drop down list 'drop' when any character is entered in the text area?