Hline select after creation

 
Hi, Is there a way to programatically select a H-line just after it has been created, so that it can be moved with mouse without having to doubleclick it first ?
 

after it's been created programmatically or manually ?

 
The line is created at runtime, would also like to select it programatically at the same time, so it can be moved with mouse without having to doubleclick first.
Reason: