Programmatically swapping the display output of a laptop

[Drydo]

In short, is it possible to swap/change the display output of a laptop
to a CRT programmatically?

The scenario is that we have a laptop that at the startup of a
specific application would automatically switch its output from the
LCD screen to a CRT. Is this possible? Well, the laptop is running
Windows XP and the driver doesn't support this function through the
Driver's Advanced Settings, however, the same laptop running Win98
allowed the screen output to be swapped without restarting the machine
- in addition, running XP has somehow disabled the 'FN' key.....

So, I know its possible that the hardware can do this - but how can I
programmatically achieve this. The basic GDI functions don't seem to
accomodate these functions - so it looks like I'm going to have to
move down to the Driver functions, if possible. Looking around there
are several functions in DDK (Device Developer Kit) but can I get
access to them directly (if so, where are they!) or do I have to
through the display driver and if so, how should I access that!

Any help or resources is greatly appreciated

Mark D