text:  ArcU32 comp_off; 
   ArcU32 comp_len; 
  } ArcCSXitDocHandle; 
  
  typedef struct_ArcCSXitDoc 
  { 
   ArcCSXitDocFields doc_flds; 
   ArcCSXitDocHandle doc_hndl; 
  } ArcCSXitDoc; 
  
  From the previous example, the*ArcCSXitApplGroup*structure consists of the application 
  group name, the application group identifier (agid), and the AGID name (agid_name). This 
  information is important because it indicates the input to the functions. Structures that are 
  specific to a function are also included in the header file. 
  
  In the following sections, we examine each exit and describe its usage. 
  
  **11.5.2 Load exit**
  
  The load exit is used to send a notification after a document is loaded. The header file in 
  Example 11-10 shows the information that can be incorporated into the notification message. 
  
  *Example 11-10 Header file of the load exit*