点击按钮计算文本框中文本长度

void CMFCApplication1Dlg::OnBnClickedButton1(){    CString strInput;    GetDlgItemText(IDC_EDIT_INPUT, strInput);    int nLen = strInput.GetLength();    CString strOutput;    strOutput.Format(TEXT("字符串长度：%d,字符个数：%d"), nLen, nLen);     SetDlgItemText(ID_STATIC_OUTPUT, strOutput);}