Add a radio box for comparison operator selection. The TEXT statement specifies text for the dialog box that appears on line 15 and begins in column 1. The RADIOBOX statement specifies that a radio box will appear in the dialog box. DEFAULT= specifies that the first radio button (Greater Than or Equal To) will be selected by default. The RBUTTON statements specify the mutually exclusive choices for the radio buttons. SUBSTITUTE= gives the value that is substituted for the %3 in the preceding DIALOG statement if that radio button is selected.
text #15 @1 'Choose a comparison criterion:'; radiobox default=1; rbutton #16 @5 'Greater Than or Equal To' substitute='GE'; rbutton #17 @5 'Less Than or Equal To' substitute='LE'; rbutton #18 @5 'Equal To' substitute='EQ'; quit;