The DIALOG statement defines the dialog box that appears when the user selects Other Departments. The DIALOG statement modifies the command string so that the name of the department that is entered by the user is used to change deptxx in the SAS program that is included. See Using a Data Entry Program . The first two TEXT statements specify text that appears in the dialog box. The third TEXT statement specifies an input field. The name that is entered in this field is substituted for the @1 in the DIALOG statement. 
       dialog deother 'end;pgm;include de;c deptxx @1;submit';
          text #1 @1 'Enter department name';
          text #2 @3 'in the form DEPT99:';
          text #2 @25 len=7;