[#CMessageHeader-MESSAGE_SIZE_OFFSET]
= xref:CMessageHeader.adoc[CMessageHeader]::MESSAGE&lowbar;SIZE&lowbar;OFFSET
:relfileprefix: ../
:mrdocs:

Byte offset of the payload size field within the header&period;

== Synopsis

Declared in `&lt;protocol&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
inline constexpr static
size&lowbar;t MESSAGE&lowbar;SIZE&lowbar;OFFSET = std&colon;&colon;tuple&lowbar;size&lowbar;v&lt;MessageStartChars&gt; &plus; MESSAGE&lowbar;TYPE&lowbar;SIZE;
----


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