델파이 왕초보자입니다
  스트링그리드와 버튼 , ExcelApplication,  ExcelWorksheet, ExcelWorkbook을
  폼에 추가 시키고 아래 코드로 컴파일 하면
[Error] Unit1.pas(28): Declaration of 'ExcelToGrid' differs from previous declaration
이런 에러가 뜹니다...무슨 에러인가요..
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procedure TForm1.ExcelToGrid(sFile : String; sGrid : TStringGrid;sCol:Integer);


procedure TForm1.ExcelToGrid(sFile : String; sGrid : TStringGrid;sCol:Integer);
var
    ExcelApp, ExcelBook, ExcelSheet : Variant;
    i, j                            : Integer; // 순환변수
Begin
    try
        ExcelApp := CreateOLEObject('Excel.Application');
    except
        ShowMessage('Excel이 설치되어 있지 않습니다!!!');
        Exit;
    end;
    Try
        ExcelApp.Visible         := False;
        ExcelApp.DisplayAlerts   := False;
        ExcelBook   :=  ExcelApp.WorkBooks.Open(sFile);
        ExcelBook   :=  ExcelApp.WorkBooks.item[1];
        ExcelSheet  :=  ExcelBook.Worksheets.Item[1];

        sGrid.RowCount  :=  ExcelSheet.UsedRange.Rows.count;
        sGrid.ColCount  :=  sCol;

        For  i  :=  1   to  ExcelSheet.UsedRange.Rows.count   do
             For J := 1 to  sCol  do
                  sGrid.Cells[j-1,i-1] := VarToStr(ExcelSheet.Cells[i,j]);  

        ExcelApp.WorkBooks.Close;
        ExcelApp.quit;
        ExcelApp := unassigned;
    Except
      on err : exception do  begin
          ExcelApp.WorkBooks.Close;
          ExcelApp.quit;
          ExcelApp := unassigned;
          ShowMessage('작업이 취소되었습니다. Data확인요망-'+err.message);
      end;
    end;
    sGrid.FixedRows  := 1;
    ShowMessage(IntToStr(sGrid.RowCount) + '건의 자료를 변환하였습니다');
End;


procedure TForm1.Button1Click(Sender: TObject);
begin
    ExcelToGrid(Edit1.Text,StringGrid1,20);
end;