Response.Redirect and whether a new window is opened?

I've been banging my head against a particularly irksome parameter for what seems like years!
In particular, I read the second parameter of "Response.Redirect" ("EndResponse" --  boolean) as determining whether this Method can spawn a new browser window (or more precisely whether execution continues). Such behaviour would be helpful in (for example) cases where your form is collecting a putative URL from the User and you want the ability to TEST that the URL opens what they expect.
For example,
Response.Redirect(myURL, False); would seem to indicate that you could attempt to open an additional browser window to test that the contents of te variable "myURL" point to a valid page.
The asp:Hyperlink contol has a "Target" property which can be statically set to "_blank" causing the desired "new window" action. Can the "Targe" ...