[OpenLayers-Users] Event for vector start/end draw

[Ben Brehmer]

Hi all,

I was wondering if there is a way to set an event for when a vector has 
been drawn and an event for when a vector first starts to be drawn. 
Basically I have a requirement that only one vector ever be 
displayed....so I'd like to erase any previously drawn vectors when the 
next vector starts to be drawn.

Thanks for any help,

Ben