16进制写入PE头

HANDLE hFile;
CString path="c:\\aa.7z";
hFile=CreateFile(Path,GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
if (hFile==NULL)
{
AfxMessageBox("打开失败");
}
unsigned char mz[]={0x4D,0x5A,0x90,0x00,0x03,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0xFF,0xFF,0x00,0x00};
SetFilePointer(hFile,0,NULL,FILE_BEGIN);
WriteFile(hFile,(LPCVOID)mz,16,&dwWritten,NULL);//写MZ头
CloseHandle(hFile);