C#

<br />
Example<br />
// cs_using_statement.cs<br />
// compile with /reference:System.Drawing.dll<br />
using System.Drawing;<br />
class a<br />
{<br />
   public static void Main()<br />
   {<br />
      using (Font MyFont = new Font("Arial", 10.0f), MyFont2 = new Font("Arial", 10.0f))<br />
      {<br />
         // use MyFont and MyFont2<br />
      }   // compiler will call Dispose on MyFont and MyFont2<br />
<br />
<br />
<br />
<br />

<br />
if(LoadFileOnStart.ToLower().EndsWith("rtf")|LoadFileOnStart.ToLower().EndsWith("doc")){<br />
using (StreamReader r = new StreamReader(LoadFileOnStart,System.Text.Encoding.Default)){<br />
MainTextArea.Rtf = r.ReadToEnd();<br />
	r.Close();<br />
      }<br />
  }<br />

if(LoadFileOnStart.ToLower().EndsWith("rtf")|LoadFileOnStart.ToLower().EndsWith("doc"))
  {
  using (Stream r = File.OpenRead(LoadFileOnStart)){
    MainTextArea.LoadFile(r, RichTextBoxStreamType.RichText);
    r.Close();
  }
}

string ToHex(int number)
{
    return number.ToString("X");
}
 
int FromHex(string number)
{
    return int.Parse(number, 
        System.Globalization.NumberStyles.HexNumber);
}

R.Bischoff | C++
 
.NET, Kommst du mit?

///////// 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;
        }
    }
}