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Return Value Naming Convention

Return Value Naming Convention

This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This page may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.

The MAPICODE.H header file contains many of the values that a client or service provider might return from an interface method implementation or might see returned from a call.

The codes to represent warning and failure conditions follow a different naming convention that begins with the prefix MAPI, an underscore, and either a W or an E to indicate the type of code. The rest of the code is a short character string to describe the condition. Each word in the string is separated by an underscore. For example, the error value MAPI_E_TOO_COMPLEX indicates that the implementation could not handle whatever was being requested in the call. The warning value MAPI_W_PARTIAL_COMPLETION indicates that the call succeeded, but that there were problems. Only part of the operation was completed successfully.

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