interupt code for user input

Can you suggest a way to interupt my code whilst the user selects a row. ie. if I wanted to move the contents of one row to another I would want to say:
"select source row" (and want the user to click on any cell in that row) I could then put the rownumber in a variable with

Please Login or Register  to view this content.

then "Select destination row" (same, wait for the user to select a cell in the row) then either continue with code or click OK to continue. I have tried a messagebox but this wont allow me to select a row without first clicking OK

Links should help

http://spreadsheetpage.com/index.php...elected_range/

http://www.ozgrid.com/VBA/inputbox.htm

VBA Noob