CGIDEV2 and checkboxes - Solution ; WAS: Checkbox naming and reference

After a lot of frustration and experimentation and with the help of a solid 
nudge in the correct direction (thanks B.C.) I now have a working solution.  To 
save anyone else the headaches I've suffered researching this, the bare bones 
code is posted below.
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HTML entry screen:
(This is inside of a table with is in turn embedded in a form)

   <tr>
      <td><div align="left"><font color="white">*</font>Contact Type:</div></td>
      <td><div align="left">
/$ContTypList
          <INPUT TYPE=CHECKBOX
                 NAME="ContTypChkBox"
                 VALUE="/%vdContTypVal%/"
                 /%vdContTypChecked%/>/%vdContTypDsp%/<BR>
/$ContTypListX
      </td>
   </tr>  

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RPG code that displays the above screen:

//This is inside the loop that creates multiple checkboxes:
 updHTMLvar('vdContTypVal':ValueField);
 updHTMLvar('vdContTypDsp':DisplayText);
 wrtsection('ContTypList');
-----------------------------------------
RPG code that traps users' entry:
 
     p GetChkBox       b
     d                 pi
      * Get checkbox entries: 
     d NumChecked      s             10i 0
     d Loop#           s             10i 0
      /Free
        NumChecked = ZhbGetVarCnt('ContTypChkBox'); 
        For Loop# = 1 To NumChecked;
          AField = %Trim(ZhbGetVar('ContTypChkBox':Loop#));
          DoSomethingWith(AField);
          //vdContTypChecked can be given the value of 'checked'
          // at this point if page is to be re-presented.
        EndFor;
      /End-Free
     p GetChkBox       E

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Seems so simple once I look back on it, but man this was a pain!

Thanks to all who took the trouble to make suggestions on how to do this.
Don Freeman