vspace or line space in text of wrap fig

Question

I am using wrap fig and want to insert a line break within the text. However, \vspace or \linebreak or \break don't lead to any change.

Here is a sample of my LaTeX code

\begin{figwindow}[0,r,%
       {\includegraphics[height=2in]{PascoSynthesizer.eps}},%
       {\label{fig:label} Caption
        }]
\textbf{Electronic Output}:\\
A sum of nine harmonics of sine waves with a\\ fundamental of 440 Hz plus a second output of the fundamental. \\
\vspace{0.3in}
\textbf{Controls:}\\
    \end{figwindow}

Answer 1

picinpar is quite an old package with several restrictions, a newer package for these kind of inserts is wrapfig however you can force a space by adding a blank line with a strut (or a rule of a specified height if you need finer control).

\documentclass[a4paper]{article}
 \usepackage{picinpar}
 \usepackage[demo]{graphicx}

\begin{document}
\begin{figwindow}[0,r,%
       {\includegraphics[height=2in]{PascoSynthesizer.eps}},%
       {\label{fig:label} Caption
        }]
\noindent
\textbf{Electronic Output}:\\
A sum of nine harmonics of sine waves with a\\
fundamental of 440 Hz plus a second output of the fundamental.\\
\strut\\
\textbf{Controls:}
    \end{figwindow}
\end{document}

Answer 2

I guess you have to check your preamble. If I use:

 \documentclass[a4paper]{article}
 \usepackage{picinpar}
 \usepackage{graphicx}

and then your code, everything runs well, as you can see from the screenshot below (or isn't this the desired output?):