C#

///////// these are declared as member variables...copied here for clarity
        private Excel.ApplicationClass m_objExcel =  null;
        private Excel.Workbooks m_objBooks = null;
        private Excel._Workbook m_objBook = null;
        //private Excel.Sheets m_objSheets = null;
        private Excel._Worksheet m_objSheet = null;
        private Excel.Range m_objRange =  null;	
        private object oMissing = System.Reflection.Missing.Value;
///////////////////////////////////////////////////////////////

	try
	{
		FileInfo inf = new FileInfo(excelFileName);
		
		m_objExcel = new Excel.ApplicationClass();
		m_objExcel.Visible = false;
		m_objBooks = m_objExcel.Workbooks;
		m_objBook = m_objBooks.Open(inf.FullName, oMissing, oMissing,
			oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, 
			oMissing, oMissing, oMissing, oMissing, oMissing, oMissing);

		m_objSheet = (Excel._Worksheet)m_objBook.Sheets[2];

		string transformFileName = string.Format(@"{0}\{1}.cvt",inf.DirectoryName,inf.Name);

		m_objSheet.SaveAs(transformFileName,Excel.XlFileFormat.xlTextWindows,oMissing,oMissing,oMissing,false,false,oMissing,oMissing,oMissing);

		activeFile = new FileInfo(transformFileName);

	}
	catch(Exception ex)
	{
		throw ex;
	}
	finally
	{
		if( m_objBook != null)
		{
			m_objBook.Close(false, oMissing, oMissing);
			System.Runtime.InteropServices.Marshal.ReleaseComObject (m_objBook);
			m_objBook = null;
			System.Runtime.InteropServices.Marshal.ReleaseComObject (m_objBooks);
			m_objBooks = null;
			m_objExcel.Quit();
			System.Runtime.InteropServices.Marshal.ReleaseComObject (m_objExcel);
			m_objExcel = null;	
		}
	}

class TooltipForm : Form
{
    ...
    protected const int WS_EX_NOACTIVATE = 0x08000000;
    
    protected override CreateParams CreateParams
    {
        get
        {
            CreateParams cp = base.CreateParams;
            cp.ExStyle |= WS_EX_NOACTIVATE;
            return cp;
        }
    }
}

public void OnClickButton1(object sender, EventArgs e){<br />
  Response.Write("<javascript>window.open("www.codeproject.com");</javascript> );<br />
<br />
}

R.Bischoff | C++
 
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