CString转为unsigned char

CString转为unsigned char ， 平台vs2008（vc9），在mfc工程中经常要遇到CString转为unsigned char问题。

CString转unsigned char *：

CString str("abcd");
unsigned char *source = (unsigned char*)str.GetBuffer(0);

打印它：

for (int i = 0; i < str.GetLength(); i ++)
{
      printf("%c", source[i]);
}

CString转unsigned char数组：

        CString str("abcd");
	unsigned char source[1024] = {0};
	memcpy(source, (unsigned char *)str.GetBuffer(0), str.GetLength() * 2);

打印同上。