I'm glad to see that the last update of Draftsight added support for it. (V1R4 x64) - I am always working with dwg/dxf client information.
However if i have SW open and draftsight, although the draftsight window is active and the SW is not, moving the spacemouse zooms and pans both SW as well as draftsight.
With SW active draftsight doesn't zoom.
Same thing happens with google earth and draftsight.
Looks like draftsight has the problem...like it listens to the spacemouse but fails to take it over exclusively. The 3D mouse remians active in the previously active application when used in daftsight.