Hi, I done some Googling on this, and came across this..
Yes, this size of the form is limited
to the size of the desktop (more
specifcally
SystemInformation.MaxWindowTrackSize).
This is done in the Form.SetBoundsCore
protected virtual method. This
behaviour cannot be changes or at
least without a great deal of work and
using PInvoke.
Also supported here
The size of the form in the designer
is limited by your screen size.
It sounds like you have your display
at 1600x1200, hence the designer won't
let you go larger then 1212.
If you had your display at 1280x1024,
then the designer wouldn't let you go
larger then 1036.
I'm not really sure why the size of
the form in the designer is limited to
the screen size, as I may deploy on a
machine that has a larger screen size
them my development machine...
So looks like it cannot be done.. Thats some strange behaviour since it looks like you are limited to whatever your dev machine is..
I think the only way to do it is to size to the maximum resolution possible, set the form size, then revert back, but never touch the size again.