[vtkusers] cursor management

[Dean Inglis]

I have an application in which Id like to have
a cursor to indicate rotation is occuring during 
widget interaction, however,
VTK is limited to a basic set of cursors which does
not include such a cursor.  Im guessing
this is to maintain cross-platform compatibility.
Anyone have any experience coding a custom
cursor they could share (Windows or any other
platform)?  

thanks,
Dean