Procedure control directives allow you to organize your code into procedures. The PROC and ENDP directives mark the beginning and end of a procedure. Also, PROC can automatically:

• Preserve higher register values that should not change but that the procedure might otherwise alter
  
• Set up a local stack pointer, so that you can access parameters and local variables placed on the stack
  
• Adjust the stack when the procedure ends

This section describes the following procedure control directives:

PROC LOCAL
ENDP