[TxMt] Set Selection from a tmCommand

[Hans-Joerg Bibiko]

Hi,

would it be possible to set a selection in the current document by  
using a tmCommand?

Example:
('|' is indicating the caret position)

-This is a te|xt line.


I invoke a tmCommand which calculates the starting point of a  
selection, and it sets the selection to e.g.
('[' and ']' indicate the selection)

-This [is a te]xt line.


Thanks!

Best,

Hans