How to create a selection window in a tool?

ittayd

I want to create a tool that allows to select several entities by either picking them or a selection window. But how do I draw the selection window?

sdmitch

I want to create a tool that allows to select several entities by either picking them or a selection window. But how do I draw the selection window?

The "Select by Polygon" plugin you can find on my blog is an example of drawing the selection window then selecting the entities within it.