In the following example, assume that SUBONE is defined as an external reference in the input program module. A CHANGE statement is used to change the external reference to NEWMOD as shown in Figure 1.

Figure 1. Changing an external reference and an entry point

In the program module MAINROUT, every reference to SUBONE is changed to NEWMOD. The INCLUDE statement specifies the ddname SYSLMOD, allowing the library to be used both as the input and the output module library.

More than one change can be specified on the same control statement. If, in the same example, the entry point is also to be changed, the two changes can be specified at once (see Figure 1).

Because the main entry point name is changed from BEGIN to MAINEP, you must use the ENTRY statement to change the library directory entry for the module to reflect the new name of the entry point.