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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="PetscDrawIsNull"><H1>PetscDrawIsNull</H1></A>
Returns <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> if draw is a null draw object.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdraw.h"
PetscErrorCode PetscDrawIsNull(PetscDraw draw,PetscBool *yes)
</PRE>
Not collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>draw </B> -the draw context
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>yes </B> -<A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> if it is a null draw object; otherwise <A HREF="../Sys/PETSC_FALSE.html#PETSC_FALSE">PETSC_FALSE</A>
<br>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sys/classes/draw/impls/null/drawnull.c.html#PetscDrawIsNull">src/sys/classes/draw/impls/null/drawnull.c</A>
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