API修改访问注册表的权限

#include <Windows.h> 
#include <Aclapi.h> 
#pragma comment (lib,"Advapi32.lib")

void SetRegPrivilege() 
{ 
DWORD dwRet;

// 下面这个字符串的值修改为想要进行权限操作的注册表项，注册表每一级的权限是不一样的，所以需要很具体地指定到某一级
LPSTR SamName = "MACHINE\\SAM\\SAM"; 
PSECURITY_DESCRIPTOR pSD = NULL; 
PACL pOldDacl = NULL; 
PACL pNewDacl = NULL; 
EXPLICIT_ACCESS ea; 
HKEY hKey = NULL;

// 获取SAM主键的DACL 
dwRet = GetNamedSecurityInfo(SamName, SE_REGISTRY_KEY, DACL_SECURITY_INFORMATION, 
NULL, NULL, &pOldDacl, NULL, &pSD); 
if (dwRet != ERROR_SUCCESS) 
{ 
printf("GetNamedSecurityInfo Error: %d\n", dwRet); 
goto FreeAndExit; 
}

// 创建一个ACE，允许Everyone完全控制对象，并允许子对象继承此权限 
ZeroMemory(&ea, sizeof(EXPLICIT_ACCESS)); 
BuildExplicitAccessWithName(&ea, "Everyone", KEY_ALL_ACCESS, SET_ACCESS, 
SUB_CONTAINERS_AND_OBJECTS_INHERIT);

// 将新的ACE加入DACL 
dwRet = SetEntriesInAcl(1, &ea, pOldDacl, &pNewDacl); 
if (dwRet != ERROR_SUCCESS) 
{ 
printf("SetEntriesInAcl Error: %d\n", dwRet); 
goto FreeAndExit; 
}

// 更新SAM主键的DACL 
dwRet = SetNamedSecurityInfo(SamName, SE_REGISTRY_KEY, DACL_SECURITY_INFORMATION, 
NULL, NULL, pNewDacl, NULL); 
if (dwRet != ERROR_SUCCESS) 
{ 
printf("SetNamedSecurityInfo Error: %d\n", dwRet); 
goto FreeAndExit; 
}

// 打开SAM的子键 
dwRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SAM\\SAM\\Domains\\Account\\Users\\000001F4", 
0, KEY_ALL_ACC