How do I include Postscript graphics in a LaTeX file?

Question

I am trying to include sample.ps file to my document with the following code

\documentclass{article}
\usepackage[margin=3cm,a4paper]{geometry}
\usepackage{amsmath,amsthm}
\usepackage{amsfonts}
\usepackage{graphicx}
\usepackage{psbox}

\begin{document}

\PSbox{sample.ps}{4in}{6in}

\end{document}

But it is failing. Is it possible to include .ps file to our latex document? Is there any method like \includepdf[pages=-]{my_file.pdf} ?

Answer 1

Trying the solution suggested by @user11232, it does work. Since that user is no longer available, and with the desire to respond this unanswered question, it is important to have it solved for future references in the site.

The PDF output was generated with LaTeX-->PS-->PDF in TeXnicCenter, by taking the sample.ps image provided by OP in comments

\documentclass{article}
\usepackage[margin=3cm,a4paper]{geometry} 
\usepackage{amsmath,amsthm} 
\usepackage{amsfonts} 
\usepackage{graphicx} 
\usepackage{auto-pst-pdf} 

\begin{document} 

\includegraphics[width=4in]{sample.ps} 

\end{document}