Find substring in CString string

CString strText; strText.Format(_T("AB#CD#EF#"));
CString strPattern1; strPattern1.Format(_T("CD"));
CString strPattern2; strPattern2.Format(_T("ED"));
int nFind1 = strText.Find(strPattern1);//3
int nFind2 = strText.Find(strPattern2);//-1
CString strFind; strFind.Format(_T("nFind1 : %d\nnFind2 : %d"), nFind1, nFind2);
AfxMessageBox(strFind);