CreateFileW返回-1，GetLastError返回2（系统找不到指定的文件。）
运行最新的VS社区2017 使用Windows 10和最新更新。
也尝试了这些注册设置：
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem]
"LongPathsEnabled"=dword:00000001
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Policies]
"LongPathsEnabled"=dword:00000001
代码：
;-------------------------------------------------------------------------------------------
extern ExitProcess:proc
extern CreateFileA:proc
extern CreateFileW:proc
extern ReadFile:proc
extern GetLastError:proc
extern CloseHandle:proc
;----------------------------------------------------------------------------------------------
GENERIC_READ equ 080000000h
FILE_ATTRIBUTE_NORMAL equ 080h
OPEN_EXISTING equ 3
OPEN_ALWAYS equ 4
;-------------------------------------------------------------------------------------------
.data
align 1
gFileName db "D:\C# Projects\TestAsm\Simple.txt", 0 ;Simple.txt contains Hello
;gFileName db "\\?\D:\C# Projects\TestAsm\Simple.txt", 0 ;Tried this too.
gFileHeapPtr db 10 Dup(0)
;-------------------------------------------------------------------------------------------
align 8
gFileHandle dq 0
gBytesRead dq 0
;-------------------------------------------------------------------------------------------
.code
;-------------------------------------------------------------------------------------------
main proc
mov rbp, rsp
mov rcx, offset gFileName
mov rdx, GENERIC_READ
xor r8, r8
xor r9, r9
push 0
push FILE_ATTRIBUTE_NORMAL
push OPEN_EXISTING
sub rsp, 32
call CreateFileA ; CreateFileA works fine.
;call CreateFileW ; Returns -1
;call GetLastError ; Returns 2 > The system cannot find the file specified.
mov rsp, rbp
mov gFileHandle, rax
mov rcx, gFileHandle
mov rdx, offset gFileHeapPtr
mov r8, 5
lea rax, gBytesRead
mov r9, rax
push 0
sub rsp, 32
call ReadFile
mov rsp, rbp
mov rcx, gFileHandle
sub rsp, 32
call CloseHandle
mov rsp, rbp
call ExitProcess
main endp
;-------------------------------------------------------------------------------------------
End
;-------------------------------------------------------------------------------------------