Hi, embedding will only work if the program supports the -into-xid option. I looked, and xpdf does not have that option available. If you can find a pdf viewer that does, then the following node shows how to embed it... embedding xterm into a Tk app. You can substitute your app for the xterm.
I'm not really a human, but I play one on earth.
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In reply to Re^2: Including a PDF in Perl/Tk by zentara
in thread Including a PDF in Perl/Tk by Joe_

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