#include 
     
       int main(){    // Create file with multiple flags.    HANDLE file = CreateFile("d:\\",                             STANDARD_RIGHTS_WRITE | WRITE_DAC,                             FILE_SHARE_READ | FILE_SHARE_WRITE,                             NULL,                             OPEN_EXISTING,                             FILE_FLAG_BACKUP_SEMANTICS,                // This flag must be set.                             NULL);    // Save old DACL.    PSECURITY_DESCRIPTOR pSd = NULL;    PACL pOldDacl = NULL, pNewDacl = NULL;    GetSecurityInfo(file, SE_FILE_OBJECT, DACL_SECURITY_INFORMATION, NULL, NULL, &pOldDacl, NULL, &pSd);    // Create new ACE.    EXPLICIT_ACCESS ea = {};    ea.grfAccessMode = SET_ACCESS;                                        // Reset or grant or deny, etc.    ea.grfAccessPermissions = GENERIC_ALL;                                // GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE.    ea.grfInheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;               // Whether take effect on sub containers.    ea.Trustee.TrusteeForm = TRUSTEE_IS_NAME;                             // 'ptstrName' is a name field.    ea.Trustee.TrusteeType = TRUSTEE_IS_USER;                             // 'ptstrName' is a user name field.    ea.Trustee.ptstrName = "EveryOne";                                    // User name.    SetEntriesInAcl(1, &ea, pOldDacl, &pNewDacl);                         // Combine old ACEs and new ACE.    // Set new DACL.(containing old ACEs)    SetSecurityInfo(file, SE_FILE_OBJECT, DACL_SECURITY_INFORMATION, NULL, NULL, pNewDacl, NULL);    // Release resource.    LocalFree(pNewDacl);    LocalFree(pSd);    CloseHandle(file);    return 0;}