Setting the starting index of an NSComboBox

FROM : Steve Hunt
DATE : Fri Jun 23 22:13:45 2006

I am just starting with Cocoa and I am having a problem in setting 
the starting index of a NSComboBox control. On startup, the index is 
not set although the first item is displayed. You have to make a 
selection to enable the combo box and set an index. In my app, I 
would like the first item to be selected on startup.  I assume the 
following code:

[calcTypeField selectItemAtIndex:0];

will work, but I cannot determine where to place the code to effect 
the selection on startup.

Steve Hunt