Sorry about vague title.

I have a grid. When the grid is built in code I want one of the columns to have checkbox class instead of textbox. So I remove the textbox and add a checkbox-based class:

.RemoveObject( "Text1" )	
.AddObject( "print_it", "chk_select_to_print" ) 

The following is the code that defines the "chk_select_to_print" class:

DEFINE CLASS chk_select_to_print AS CHECKBOX

 PROCEDURE InteractiveChange

  if this.value
     * my code goes here
  else
     * my code goes here
  endif		
 END PROCEDURE
		
ENDDEFINE

But the code InteractiveChange method never fires when I click on the check box in the grid.

What am I missing?

Thank you.