I want to have something on the screen the whole time a program is running,
and I am told I do this by hooking and interrupt. I have looked at some
sample code of this type of stuff but have no idea how to get it working. If
anyone could help it would be great.

I am making a budget program and at the beginning of the program the user
enters their weekly income, then as they enter expenses they wish to put
money aside for it deducts from the income. I would like it to display the
remaining amount of money they have on the screen the whole time the program
is running.  I can do all the code for everything except making it stay on
screen.

Thanks.