C#

public class Component
{
   private static object syncObject = new object();

   public static void ST_F1()
   {
        lock(syncObject)
        {
            ...
        }
    }

   public static void ST_F2()
   {
        lock(syncObject)
        {
            ...
        }
    }
}

class XYZ
{
   static object syncObject = new object();
   void SomeMethod()
   {
      abc.SomeEvent += new SomeEvent(SomeEventHandler);
   }

   void SomeEventHandler(...)
   {
       lock(syncObject)
       {
          Component.Method1();
           ...
       }
    }
}

private void MyDlg(---,--,---)
{
  lock(syncObject)
  {
   Componet.St_F4(--);
   Componet.St_F1(--,--,---);
    Componet.St_F3(---,--);
   }
}

Thread1
-------
Component.ST_F4
Component.ST_F3
Component.ST_F1

Thread2
-------
Component.ST_F4
Component.ST_F3
Component.ST_F1

Thread1
-------
Component.ST_F4

Thread2
-------
Component.ST_F4

Thread1
-------
Component.ST_F3
Component.ST_F1

Thread2
--------
Component.ST_F3
Component.ST_F1

Bitmap bg;<br />
    bg=(Bitmap)Bitmap.FromFile(@"Your image.bmp");<br />
    bg.MakeTransparent(Color.White);

private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)<br />
   {<br />
	e.Graphics.DrawImage(bg,0,0,this.Width,this.Height);<br />
<br />
        //If you used an ImageList<br />
        //e.Graphics.DrawImage(imageList1.Images[backgroundIndex],0,0,this.Width,this.Height);<br />
   }