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]

@ittayd said:

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.