check box has to be selected automatically when a value is entered in edit box

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MFC

Hi,

im doing a prog in which , when “Load” is entered in text box the check box has to be selected automatically ...i dono how to do it ,,, please help me

this is my code

if (pWnd->GetDlgCtrlID("Load") == IDC_EDIT1)
    {
          // Set the text color to red
          pDC->SetTextColor(RGB(255, 0, 0));

          // Set the background mode for text to transparent
          // so background will show thru.
          pDC->SetBkMode(TRANSPARENT);

      // Return handle to our CBrush object
          hbr = m_brush;
     }




       if (pWnd->GetDlgCtrlID() == IDC_CHECK1)
       {
          // Set the text color to red
            pDC->SetTextColor(RGB(255, 0, 0));

          // Set the background mode for text to transparent
          // so background will show thru.
            pDC->SetBkMode(TRANSPARENT);


          DWORD dwStyle = pWnd->GetStyle("Load");

         if ( dwStyle &(BS_AUTOCHECKBOX |BS_CHECKBOX) )

          // Return handle to our CBrush object
            hbr = m_brush;
       }

thanks in advance