How to make a selection with VBA

I am looking for the VBA method for making a selection based on position, just as you would in the interface with the rectangular selection box. For example, how to select all objects inside of the area (0,0) to (1,1)?

This seems very basic as it is what I'm doing all day long when using CorelDraw, but I have several hours searching for a programmatic way to do this and have hit a a wall. Any ideas?? Thanks