Is PDFNet SDK available as unmanaged 64-bit C/C++ library?

Q: Your website says the PDFNet SDK is available as a .NET component,
JAVA, AND as a C/C++ library on Windows etc. However, I have a need
for a 64-bit C/C++ library for running on Windows. Do you have a
configuration that would work natively in 64-bit unmanaged processes?
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A: You could use 32- bit version of PDFNet SDK on both 32 and 64-bit
windows (for everything except for conversion via a virtual printer
driver).

If required, PDFTron also offers a true 64-bit unmanaged library:
http://www.pdftron.com/downloads/PDFNetC64.zip (or from
http://www.pdftron.com/pdfnet/downloads.html).

Q: I tried to run PDFNet for C++ samples on 64-bit Windows but I get
an error. I use Visual Studio 2010.
What I am doing wrong?
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A: After you open a sample solution select Menu > Build >
Configuration Management and select 'x64' option.