//如果照下面这样的调用不会的.
var
xlsApp:OleVariant;
I:Integer;
begin
mmo1.Lines.Clear;
xlsApp:=CreateOleObject('Excel.Application');
try
xlsApp.Workbooks.Open('F:\book1.xls');
for I:=1 to xlsApp.sheets.count do
mmo1.Lines.Add(xlsApp.Sheets[I].Name);
finally
xlsApp.quit;
xlsApp:=null;
end;
end;