Laparoscopic surgery for the gallbladder and the bile duct. Laparoscopic gallbladder removal has been performed in thousands of patients throughout the world and is a very safe procedure. Gallbladder removal should be performed by laparoscopic surgery when possible. In contrast to laparoscopic gallbladder surgery, laparoscopic procedures on the bile duct are rarely performed by biliary surgeons since they are technically very difficult.
Now that you've learned how to use the macro designer, it's time to learn about some of the new features of macros. Probably the most exciting feature is the ability to add data macros to your tables. A data macro is a macro that executes in response to data changing within a table.
A macro variable is like a standard data variable except that it does not belong to a data set and has onl y a single value. which is always character. The value of a macro variable could be a variable name, a numeral, or any text you want. substituted in your program. A macro, however, is a larger piece of a program that can contain complex logic including compl ete DATA and PROC steps, and macro statements such as %IF -%THEN/%ELSE and %DO -%END.