[#BloombergLP-bdls-FdStreamBuf_FileHandler-isInBinaryMode]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdls.adoc[bdls]::xref:BloombergLP/bdls/FdStreamBuf_FileHandler.adoc[FdStreamBuf&lowbar;FileHandler]::isInBinaryMode
:relfileprefix: ../../../
:mrdocs:

Return `false` if on Windows and the file is opened in text mode, and `true` otherwise&period;

== Synopsis

Declared in `&lt;bdls&lowbar;fdstreambuf&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
isInBinaryMode() const;
----

== Return Value

`false` if on Windows and opened in text mode&semi; `true` otherwise


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