void CMy5Dlg::OnButton4() { // TODO: Add your control notification handler code here UpdateData(); double n_result; n_result=m_num1/m_num2; m_result=n_result; char sz[20]; sprintf(sz,"%f",m_result); m_CResult.setWindowText(sz); } 为什么显示'setWindowText' : is not a member of 'CEdit',求回复