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function ValidatePID(const APID: string): string;
{ÄÚ²¿º¯Êý,È¡Éí·ÝÖ¤ºÅУÑéλ,×îºóһλ,¶Ô18λÓÐЧ}
function GetVerifyBit(sIdentityNum: string): Char;
var
    nNum: Integer;
begin
    Result := #0;
    nNum := StrToInt(sIdentityNum[1]) * 7 +
            StrToInt(sIdentityNum[2]) * 9 +
            StrToInt(sIdentityNum[3]) * 10 +
            StrToInt(sIdentityNum[4]) * 5 +
            StrToInt(sIdentityNum[5]) * 8 +
            StrToInt(sIdentityNum[6]) * 4 +
            StrToInt(sIdentityNum[7]) * 2 +
            StrToInt(sIdentityNum[8]) * 1 +
            StrToInt(sIdentityNum[9]) * 6 +
            StrToInt(sIdentityNum[10]) * 3 +
            StrToInt(sIdentityNum[11]) * 7 +
            StrToInt(sIdentityNum[12]) * 9 +
            StrToInt(sIdentityNum[13]) * 10 +
            StrToInt(sIdentityNum[14]) * 5 +
            StrToInt(sIdentityNum[15]) * 8 +
            StrToInt(sIdentityNum[16]) * 4 +
            StrToInt(sIdentityNum[17]) * 2;
    nNum := nNum mod 11;
    case nNum of
   &n


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// ÅжÏÊÇ·ñÊÇÊýÖµÐÍ   By yangxiao  2007.7.21
function isNumeric(strText: WideString): Boolean;
var
  s: string;
  i, l, p: Integer;
begin
  Result := False;
  l := Length(strText);
  if l = 0 then Exit;
  s := '';
  for i:=1 to l do
  ......
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