procedure FileReplaceString(const FileName, searchstring, replacestring: string);
var
fs: TFileStream;
S: string;
begin
fs := TFileStream.Create(FileName, fmOpenread or fmShareDenyNone);
try
SetLength(S, fs.Size);
fs.ReadBuffer(S[1], fs.Size);
finally
fs.Free;
end;
S := StringReplace(S, SearchString, replaceString, [rfReplaceAll, rfIgnoreCase]);
fs := TFileStream.Create(FileName, fmCreate);
try
fs.WriteBuffer(S[1], Length(S));
finally
fs.Free;
end;
end;
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