【CEdit 方法1】
CDC* pDC = m_edit.GetDC(); CString strText(_T("")); m_edit.GetWindowText(strText); CSize size = pDC->GetTextExtent(strText); m_edit.ReleaseDC(pDC); CRect rc; m_edit.GetWindowRect(&rc); ScreenToClient(&rc); rc.right = rc.left + size.cx; m_edit.MoveWindow(rc);
【CEdit 方法2】
CRect rc; CSize size; HDC hDC; HWND hWnd; CString strTextValue; int lenStrLen; CFontDialog AAB; CEdit* edit1=(CEdit*)GetDlgItem(IDC_EDITINPUT); edit1->GetClientRect(&rc); edit1->GetWindowText(strTextValue); lenStrLen=edit1->GetWindowTextLength(); hDC=::GetDC(edit1->m_hWnd); hWnd=edit1->m_hWnd; GetTextExtentPoint(hDC,strTextValue,lenStrLen,&size); ::SetWindowPos(hWnd,HWND_TOP,rc.top,rc.left,rc.left+size.cx,rc.bottom+4,SWP_NOMOVE|SWP_NOZORDER); ::ReleaseDC(hWnd,hDC);
（src:http://www.uipower.com/bbs/thread-128063-1-1.html）
