how save name of every control that add in run time and then can use them?

Question

hi

i add some panels in runtime that every backgroundimage is different

i want when click on the button , i be able get the name of the controls that added to the form

how can i do that?

and i want when i have 2 control and i want draw line between them that i get difference between 2 control and draw a horizantel line on centry point of distance between two control
then draw a vertical short line
again draw a horizontal line to seconds control

please help me
thx