documentclass{scrbook}

usepackage{tikz}

usepackage{listings}
 lstset{%
    language=[LaTeX]TeX,
    commentstyle=color{gray},
    breaklines=true,
    frame=single,
    frameround=tttt,%
    framextopmargin=10pt,
    framexbottommargin=7pt,
    xleftmargin=22pt,
    framexleftmargin=10pt,
    framesep=10pt
}

% - - - - - - - - - - - - - % Code for highlighting.

makeatletter%
newenvironment{btHighlight}[1][]%
{begingrouptikzset{bt@Highlight@par/.style={#1}}begin{lrbox}{@tempboxa}}%
{end{lrbox}bt@HL@box[bt@Highlight@par]{@tempboxa}endgroup}

newcommandbtHL[1][]{%
  begin{btHighlight}[#1]bgroupaftergroupbt@HL@endenv%
}
defbt@HL@endenv{%
  end{btHighlight}%
  egroup%
}
newcommand{bt@HL@box}[2][]{%
  tikz[#1]{%
    pgfpathrectangle{pgfpoint{1pt}{0pt}}{pgfpoint{wd #2}{ht #2}}%
    pgfusepath{use as bounding box}%
    node[anchor=base west, fill={oposmy!30},outer sep=0pt,inner xsep=1pt, inner ysep=0pt, minimum height=htstrutbox+1pt,#1]{raisebox{1pt}{strut}strutusebox{#2}};%
  }%
}%
makeatother%

lstdefinestyle{SQL}{%
    moredelim=**[is][btHL]{`}{`},%
    moredelim=**[is][{btHL[fill=green!30,draw=red,dashed,thin]}]{@}{@}%
}

% - - - - - - - - - - - - - %

usepackage{xcolor}
definecolor{oposmy}{HTML}{c0f1ff}

begin{document}

begin{lstlisting}[style=SQL]
documentclass{scrbook}

`usepackage{fontspec`}% #1
setmainfont{`Latin Modern Sans Demi Cond`}% #2

usepackage{tikz}
usetikzlibrary{shapes.misc}

begin{document}

begin{tikzpicture}
   `node[draw,rounded rectangle, rounded rectangle arc length=180] {Text};`% #3
end{tikzpicture}

Press the `F1` key for help. Press the `tikz[baseline] draw node[anchor=base,draw,double,rounded corners] {{texttt{F11}}};` key for full screen.% #4

end{document}
end{lstlisting}

end{document}

documentclass{scrbook}

usepackage{atbegshi,ifthen,listings,tikz}
usepackage{xcolor}

definecolor{oposmy}{HTML}{C0F1FF}
tikzstyle{highlighter} = [ oposmy, line width = baselineskip ]

makeatletter

newcounter{highlight}[page]
newififhl@active

newcommand{tikzhighlightanchor}[1]{%
    ensuremath{vcenter{hbox{%
        tikz[remember picture, overlay]{coordinate (#1 highlight arabic{highlight});}}}}%
}
newcommand{bh}[0]{%
    stepcounter{highlight}%
    tikzhighlightanchor{begin}%
}
newcommand{eh}[0]{%
    tikzhighlightanchor{end}%
}
newcommand{hlstyle}{%
    globalhl@activetrue
    bh
    aftergrouphlstyleend
}
newcommand{hlstyleend}{%
    eh
    globalhl@activefalse
}

AtBeginShipout{AtBeginShipoutUpperLeft{%
    ifthenelse{value{highlight} > 0}{%
        tikz[remember picture, overlay]{foreach stroke in {1,...,arabic{highlight}}
            draw[highlighter] (begin highlight stroke) -- (end highlight stroke);}}{}%
}}

usepackage{listings}
 lstset{%
    language=[LaTeX]TeX,
    commentstyle=color{gray},
    breaklines=true,
    frame=single,
    frameround=tttt,%
    framextopmargin=10pt,
    framexbottommargin=7pt,
    xleftmargin=22pt,
    framexleftmargin=10pt,
    framesep=10pt,
    keepspaces=true
}

lstdefinestyle{SQL}{%
    moredelim=**[is][hlstyle]{`}{`},%
%    moredelim=**[is][{btHL[fill=green!30,draw=red,dashed,thin]}]{@}{@}%
}

letorig@lst@discretionary=lst@discretionary
gdeflst@discretionary{%
    ifhl@active eh fi
    orig@lst@discretionary
    ifhl@active bh fi
}

makeatother

begin{document}

begin{lstlisting}[style=SQL]
documentclass{scrbook}

`usepackage{fontspec`}% #1
setmainfont{`Latin Modern Sans Demi Cond`}% #2

usepackage{tikz}
usetikzlibrary{shapes.misc}

begin{document}

begin{tikzpicture}
   `node[draw,rounded rectangle, rounded rectangle arc length=180] {Text};`% #3
end{tikzpicture}

Press the `F1` key for help. Press the `tikz[baseline] draw node[anchor=base,draw,double,rounded corners] {{texttt{F11}}};` key for full screen.% #4

end{document}
end{lstlisting}

end{document}