lets take from beginning...
create a c# project; create a form and button.

when button clicked; program
changes the interior color of cells in an excel document which is blank and
opened in formload event.
after program started, if you dont touch anything, program fills all cells
properly. But while processing, if you clicked on some cells randomly,
program skips some of cells and go on processing. why does it do that?
i mean ;my clicks somehow interrupts program but it doesnt return any error.