Get movement speed?

Im interested in making a bouncing ball you can throw and i need to get the speed of it so i can set it to that when released so if you do it it goes fast etc and if not slow. This would be mouse based but if theres a general way thats handy to have. thanks

so... you need the speed of the "throw"?

Yeah basically, i basically wanted to get the current speed of the mouse then use that on the throw later, a example is posted here -

http://www.clickteam.com/epicenter/ubbthreads.php?ubb=showflat&Number=115390#Post1153 90

Thats basically what i want to do but it seems to have the odd glitch like slow throws don't work so well and diagonals did not always happen or it can go out of area etc. I basically wanted to make my own one but can't figure out how to get the speed of the movements made.

Edit -

It's Speed( "Active" ) but that does not work for mouse drag data so in that example only shows on release etc i think, i wanted to use the drag object extension but at the moment im not sure how to get the data.