C programming

This section contains information to help we use the MQI from the C programming language.

• Header files
  Header files are provided to help you write C application programs that use the MQI.
• Functions
  You do not need to specify all parameters that are passed by address every time you invoke a function.
• Parameters with undefined data type
  
• Data types
  
• Manipulating binary strings
  Declare strings of binary data as one of the MQBYTEn data types.
• Manipulating character strings
  When the queue manager returns character data to the application, the queue manager always pads the character data with blanks to the defined length of the field; the queue manager does not return null-terminated strings.
• Initial values for structures
  The header files define various macro variables used to provide initial values for the MQ structures when we declare instances of those structures.
• Initial values for dynamic structures
  
• Use from C++
  
• Notational conventions
  This information shows how to invoke the functions and declare parameters.

Parent topic: Introducing data types used in the MQI