Compiling plplot with MSVC 9.0 (2008) failed due to some missing/conflicting __declspec() specifiers.
There were also a mangled name (C++) of the plD_DEVICE_INFO_qt in qt.cpp.
See attached patch.
Alan W. Irwin
Thanks for your patch. I have assigned Werner Smekal (one of our developers with access to windows) to evaluate it.
Applied this patch with small modifications. Compilation works for me now with Visual C++ and qt driver.