- (void) awakeFromNib
{
[browser setTarget: self];
[browser setDoubleAction: @selector(browserDoubleClick:)];
} // awakeFromNib
...
- (IBAction) browserDoubleClick: (id) sender
{
int column = [browser selectedColumn];
int row = [browser selectedRowInColumn: column];
// then dig into your data structure with the row and column
} // browserDoubleClick