If I understand the question correctly...
first in your mdi child form properties set the Form Border Style to NONE
Then you will have NO titlebar, no re sizing , no re-locating options at all at runtime. These will need to be set at design time.
To use this approach you must set the Start Position Property to Manual. Then each time you open a new MDI child you have to set its Location Property using
Code:
NewMDIChild.Location = New Point(x,y)
Dont forget to code a means of closing each child form or you will have to close all chiuld forms at once by closing the parent form.
Good luck!