Very strange highlighting for macro that maps to a function

#include <windows.h>

struct Foo
{
    char buffer[100];
};

int main()
{
    Foo foo;
    ZeroMemory(foo.buffer, 100);
    return 0;
}

#define RtlFillMemory(d,l,f) memset((d), (f), (l))
#define RtlZeroMemory(d,l) RtlFillMemory((d),(l),0)
#define ZeroMemory RtlZeroMemory