MAPI (Messaging Application Programming Interface) handles error messages by returning error codes or error messages to the calling application when a MAPI function fails.
MAPI error codes are numeric values that provide specific information about the cause of the error. These error codes are defined in the MAPI header files and are used by MAPI functions to indicate the success or failure of a particular operation.
In addition to error codes, MAPI also provides error messages that describe the cause of the error in more detail. These error messages can help developers troubleshoot their applications and identify the source of the error.
When a MAPI function returns an error code or error message, the calling application can use this information to take appropriate action, such as displaying an error message to the user or attempting to recover from the error.
