how to create a different type of shapes of forms in vb.net 2008?

The simple example would be

private void Form2_Paint(object sender, PaintEventArgs e)
 {
     GraphicsPath path = new GraphicsPath();
     path.AddEllipse(150f, 150f, 300f, 300f);
     e.Graphics.FillPath(Brushes.AliceBlue, path);
     Region rgn = new Region(path);
     e.Graphics.Clip = rgn;
     this.Region = rgn;
     path.Dispose();
     rgn.Dispose();
 }

This is not draggable. You need to implement that functionality. Same way close, minimize buttons has to be add.

Buy why? Windows came about to give a standard appearance (and to a certain extent, a standard feature set) to applications. When you start monkeying around with stuff, users get frustrated, and then angry.

However, if you insist of pursuing this, here are the general steps, and I leave it to your superior googling skills to find out how to do perform each step:

0) Create an image in your favorite graphics program that is the shape/color you desire.

1) Set the new image as the background of your form.

2) Hide the form's various titlebar buttons, and change the border to None.

3) Create/position/wire-up your own graphical buttons to replace the ones that would normally be seen in the titlebar.

4) Populate your for with the desired controls.

You may have to do other things, but once again, I think this is a BAD idea. How are you going to treat/redesign scroll bars? How about the shapes of other controls? Are you going to leave them with perfectly square corners? How about using colors the user sets in his Windows theme settings? You're going to pretty much have to ignore those.

See? Bad idea...