Ok. After changing to use IntPtr, 64-bit seems to work. Thank you.

Your new PDFXC_Funcs file changed the signature of many API. e.g. public static extern int PXC_AddPage(int pdf, double width, double height, out int page); to public static extern int PXC_AddPage(IntPtr pdf, double width, double height, out IntPtr page); So the original sample applications do not co...

Any progress?

Any good news?

Please also note that when we install VS2015. .NET 4.6 is installed. Therefore, we are using .NET4.6 CLR to run code in .NET 4.5.1 codes. .NET 4.0+ always replace the CLR to achieve backward compatibility.

I see the same problem if I target to x64 or AnyCPU. It is ok when it targets as x86.

My OS version is Windows 7 - 64bit. I try to compile the sample C# app PDFXCDemo. The app runs if it is compiled with .NET 2.0 and debug ok in Viisual Studio. If I set my target to .NET 4 or above (e.g. .NET 4.5.1), visual studio vshost.exe crashes (see attached.) The application runs if I run the a...