Hi FReAK,
it is possible to call external code compiled into a DLL on any RT-Target, included the CVS 1450. Because the API is restricted to a subset of the WIN32API it would be the best way to use LabWindows/CVI to build the DLL. The CVI compiler can check these restrictions:
http://zone.ni.com/devzone/conceptd.nsf/webmain/619C8925F531EE7986256B110078E678?opendocument
>> section: LabWindows/CVI Functionality in the LabVIEW Real-Time Module
There are some more resources discussing topics like call/debug DLLs on LabVIEW-RT-Systems:
http://digital.ni.com/public.nsf/websearch/0BF52E6FAC0BF9C286256EDB00015230?OpenDocument
DLL-Calls in LabVIEW-RT:
http://digital.ni.com/public.nsf/websearch/10BC32F28B9D440686256BB30069AB48?OpenDocument
Call a DLL from LabV
IEW, in general:
http://zone.ni.com/devzone/conceptd.nsf/2d17d611efb58b22862567a9006ffe76/b26a875aca51c567862567ca0055ff24?OpenDocument
Related (3rd Party Hardware):
http://digital.ni.com/public.nsf/websearch/F97B93E42ABDCDDC862569AF006B9F6B?OpenDocument
Regards Thomas.