为什么这个窗口DRAW不出来？？

#include <iostream>
#include <windows.h>
#include <cstring>
using namespace std;
int main()
{
    RECT re = {10,10,100,100} ;
    HDC hDC ;
    char *pointer = \"Hellow boy!\" ;
    int length = strlen(pointer) ;
    int i = DrawText(hDC,pointer,length,&re,DT_CALCRECT) ;
    cout << i ;
    return 0 ;
}