C#中怎么调用com组件

  在网上看见这个例子:
调用com组件,导出access数据到Excel,就是直接调用access的导出功能,此方法速度超级快 
using Access; 
Access.ApplicationClass oAccess = new Access.ApplicationClass(); 
oAccess.Visible = false; 
try 
{ 
//ACCESS9: 
oAccess.OpenCurrentDatabase("d:\\wcf.mdb",false,""); 
//导出到excel 
oAccess.DoCmd.TransferSpreadsheet(Access.AcDataTransferType.acExport,Access.AcSpreadSheetType.acSpreadsheetTypeExcel9,"工作表名","d:\\wcf.xls",true,null,null); 
//导入txt 
//oAccess.DoCmd.TransferText(Access.AcTextTransferType.acExportDelim,"","Enterprise","d:\\wcf.txt",true,"",0); 
oAccess.CloseCurrentDatabase(); 
oAccess.DoCmd.Quit(Access.AcQuitOption.acQuitSaveNone); 
System.Runtime.InteropServices.Marshal.ReleaseComObject (oAccess); 
oAccess = null; 
MessageBox.Show("导入成功"); 
} 
catch(Exception ex) 
{ 
MessageBox.Show(ex.ToString()); 
} 
finally 
{ 
GC.Collect(); 
}                            请问怎么调用com组件!!!!!!!!!!!!!!!!!!