In order to send commands to a server, an application must allocate three types of structures:
A context structure, which defines a particular application context, or operating environment.
A connection structure, which defines a particular client/server connection.
A command structure, which defines a “command space” in which commands are sent to a server.
An application allocates these structures by calling the functions cs_ctx_alloc, ct_con_alloc, and ct_cmd_alloc.
The relationship between these control structures is illustrated in Figure 1-4.
Figure 1-4: Client-Library control structures
Through these structures, an application sets up its environment, connects to servers, sends commands, and processes results.
An Open ClientConnect application is restricted to one context
per application. This differs from applications written in other
versions of Client-Library, which support multiple context structures.
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