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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>openusb_get_lib_handle</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"/><LINK
REL="HOME"
TITLE="OpenUSB Developers Guide"
HREF="index.html"/><LINK
REL="UP"
TITLE="Bus and Device Operations"
HREF="ref.deviceops.html"/><LINK
REL="PREVIOUS"
TITLE="openusb_get_devid"
HREF="function.openusbgetdevid.html"/><LINK
REL="NEXT"
TITLE="openusb_get_max_xfer_size"
HREF="function.openusbgetmaxxfersize.html"/><LINK
REL="STYLESHEET"
TYPE="text/css"
HREF="/base.css"/></HEAD
><BODY
CLASS="refentry"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>OpenUSB Developers Guide</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="function.openusbgetdevid.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
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><A
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ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"/></DIV
><H1
><A
NAME="function.openusbgetlibhandle"
></A
><CODE
CLASS="function"
>openusb_get_lib_handle</CODE
></H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN578"
></A
><H2
>Name</H2
><CODE
CLASS="function"
>openusb_get_lib_handle</CODE
>&nbsp;--&nbsp;Extract openusb handle from a device handle</DIV
><DIV
CLASS="refsynopsisdiv"
><A
NAME="AEN582"
></A
><H2
>Synopsis</H2
><DIV
CLASS="funcsynopsis"
><P
></P
><A
NAME="AEN583"
></A
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int32_t openusb_get_lib_handle</CODE
>(openusb_dev_handle_t dev, openusb_handle_t * lib_handle);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN591"
></A
><H2
>Parameters</H2
><P
><CODE
CLASS="parameter"
> dev </CODE
> - Device handle.</P
><P
><CODE
CLASS="parameter"
> lib_handle</CODE
> - Address to store returned openusb handle </P
><P
></P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN598"
></A
><H2
>Description</H2
><P
><CODE
CLASS="function"
>openusb_get_lib_handle()</CODE
> gets the openusb handle of the device whose
    device handle is <CODE
CLASS="parameter"
>dev</CODE
>.</P
><P
></P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN604"
></A
><H2
>Return Value</H2
><P
><CODE
CLASS="function"
>openusb_get_devid()</CODE
> returns 0 on success.
    Otherwise, a openusb error is returned.</P
><P
></P
><P
>OPENUSB_SUCCESS - No errors.</P
><P
>OPENUSB_UNKNOWN_DEVICE - Device handle <CODE
CLASS="parameter"
>dev</CODE
>is not valid.</P
><P
>OPENUSB_BADARG - <CODE
CLASS="parameter"
>lib_handle</CODE
> is an invalid address</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN614"
></A
><H2
>See Also</H2
><P
></P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"/><TABLE
SUMMARY="Footer navigation table"
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><TR
><TD
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><A
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>Prev</A
></TD
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><A
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>Home</A
></TD
><TD
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><A
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ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><CODE
CLASS="function"
>openusb_get_devid</CODE
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ref.deviceops.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><CODE
CLASS="function"
>openusb_get_max_xfer_size</CODE
></TD
></TR
></TABLE
></DIV
></BODY
></HTML
>