#1 & 2
If the application allows the window to be resized then yes, otherwise RR will just position the top left of the app window to your top left most starting pos def in the "A" line.
If its not embedding:
#1 You either don't have the correct window title specified when loading that screen
#2 The form/window sizing/style property is set to not allow it to be resized
#3 If above two don't fix it then you might need to give more details, eg what lang app is written in, ect.