程序代码：

BYTE SetBreakPointAt(DWORD address) 
{
    DWORD dwRet=0;
    BYTE byBack=0;
    BYTE byInt=0xcc;
    ReadProcessMemory(g_hProcess,(LPVOID)address,&byBack,1,&dwRet);
    GetLastError();
    WriteProcessMemory(g_hProcess,(LPVOID)address,&byInt,1,&dwRet);
    GetLastError();
    return byBack;
}