使用Windows API編寫扇區33

Question

爲什麼當我嘗試寫入扇區33時，GetLastError返回5？

我的MASM32源代碼：

include \masm32\include\masm32rt.inc 


.data? 
hDrv HANDLE ? 


buffer byte 512 dup(?) 
tmp512 byte 512 dup(?) 

.code 

start: 

STRING p,"\\.\PhysicalDrive0" 

    call main 
    inkey 
    exit 

main proc 
local i:dword 


invoke CreateFile,addr p,GENERIC_READ or GENERIC_WRITE,NULL,NULL,OPEN_EXISTING,0,0 
mov hDrv,eax 

mov i,1 

.while TRUE 
invoke ReadFile,hDrv,addr buffer,512,addr tmp512,NULL 
invoke WriteFile,hDrv,addr buffer,512,addr tmp512,NULL 
.if eax==1 
print str$(i),13,10,0 
inc i 
.else 
invoke GetLastError 
print str$(eax),13,10,0 
.endif 
.endw 

invoke CloseHandle,hDrv 

    ret 

main endp 


end start 

Answer 1

這些錯誤代碼都在這裏解釋...

https://msdn.microsoft.com/en-us/library/windows/desktop/ms681382%28v=vs.85%29.aspx

ERROR_ACCESS_DENIED

5 (0x5) 

可能是一個權限問題。

Access is denied.