1 #include <Windows.h>
 2 #include <iostream>
 3 
 4 using namespace std;
 5 
 6 int main(){
 7 HANDLE hf = CreateFile(TEXT("c:\\test"),0,0,NULL,OPEN_EXISTING,0,NULL);
 8 cout<<(int)hf<<endl;
 9 if((int)hf != 1){
10 　　int res = GetLastError();
11 　　cout<<res<<endl;
12 }
13 system("pause");
14 return 0;
15 }

void f(){
    SetLastError(3);
    return;
}

SetLastError(0xf111);