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How do I get 8 byte alignment in VS [closed]

I have written a program using Visual Studio 2019. But I’m getting this error:

1>C:Program Files (x86)Windows 

Kits10Include10.0.18362.0umwinnt.h(2487,1): error C2118: negative subscript
This is because structures are not 8 byte aligned. Here is the macro in Winnt.h that is being used to determine that:

C_ASSERT(TYPE_ALIGNMENT(LARGE_INTEGER) == 8);

I have selected 8 byte alignment in the properties. To determine what the TYPE_ALIGNMENT is generating I wrote a small program to print the result. The result is 4.

There must be another setting that I’m missing. Does anyone know how to fix this?

Following is a clip from the Winnt.h code:

// Much of the Windows SDK assumes the default packing of structs.
#if !defined(WINDOWS_IGNORE_PACKING_MISMATCH) && !defined(__midl) && 
!defined(MIDL_PASS) && !defined(SORTPP_PASS) && !defined(RC_INVOKED)  
#if defined(__cplusplus) && (_MSC_VER >= 1600)
static_assert(__alignof(LARGE_INTEGER) == 8, "Windows headers require the 
default packing option. Changing this can lead to memory corruption."
    " This diagnostic can be disabled by building with 
WINDOWS_IGNORE_PACKING_MISMATCH defined.");
#elif _MSC_VER >= 1300
#pragma warning(push)
#pragma warning(disable: 4116)
C_ASSERT(TYPE_ALIGNMENT(LARGE_INTEGER) == 8);
#pragma warning(pop)
#endif

endif