Dialog Box in Dialog Program

Hi

I 'm going to create dialog program and I need to create another screen for dialog box and use this below code to pop up the dialog box. This dialog box is required for summary data .

CALL SCREEN 200 STARTING AT 1 1 ENDING AT 80 8.

After the dialog box show in the screen , I can't use close at right up corner of dialog box . I don' t know why . Please help me .

Regards

Wiboon