| 
	    plSetUsage
	  ( | program_string, | 
| usage_string ); | 
      Sets the program string and usage string displayed by the command
      line help option (-h) and by plOptUsage.
    
program_string
	  (PLCHAR_VECTORAn ascii character string to appear as the name of program.
usage_string
	  (PLCHAR_VECTORAn ascii character string to appear as the usage text.
This function is not used in any of our C examples.