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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
begin
case strText[i] of
'0'..'9':
s := s + strText[i];
'E', 'e', '+', '-', '.':
begin
p := PosEx(strText[i], strText, i+1);
if p = 0 then
begin
case strText[i] of
'E', 'e':
if (i=1) or (i=l) then Exit;
'+', '-':
if i > 1 then
case strText[i-1] of
'E', 'e':
s := s + strText[i];
else
Exit;
end;
end;
end
else
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procedure copyfile(sourcefilename,targetfilename : String);
var f1, f2: tfilestream;
begin
f1 := tfilestream.Create(sourcefilename, fmopenread);
try
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