Inserting a control between existing controls at runtime

You will have to get the locations on the controls that are going to be moved, make up a location for the inserted control and then add the control after setting its location.  If you have five textboxes on a form and you want to put a new one it between the forth and the fifth textboxes, you could do something like this:

// get the current location of

// textbox 5 (this is the one to displace)

Point loc5 = textBox5.Location;

// move the new location of textbox5

// down 26 - make a hole for the

// new textbox at the same spacing used

// on the other textboxes

Point newLoc = new Point(loc5.X, (loc5.Y+26));

textBox5.Location = newLoc;

// id them

textBox1.Text = "One";

textBox2.Text = "Two";

textBox3.Text = "Three";

textBox4.Text = "Four";

textBox5.Text = "Five";

// Insert new textbox at the old location

// of textbox5

System.Windows.Forms.TextBox tRex = new TextBox();

tRex.Text = "T-REX";

tRex.Location = loc5;

this.Controls.Add(tRex);