threads/delegates how-to's

Question

is there a way of using the above to pause a method mid-stride to wait for a user event (in my case a number of clicks) and then return to the calling method BUT leaving the application (windows forms) running??

background is a video project that asks the user to select various points on the video then perform some calculations on the co-ordinates. the application must allow interaction whilst waiting.

any help appreciated (sp?)

cheers