i use a program that is inaccessible to being connected to and run via code, but i want to automate the use of it

the first thing i want to do is launch the program

c:\crunchnumbers.exe

then the next thing i want to do is go to the File menu, and select open, and then open c:\numbers.csv

now the numbers are loaded in the program.

the next part is tricky because unfortunately there is no menu item, there is just a big fat 'clickable' button that says 'Calculate' on it. normally i'd have to manually click on it to run the numbers, but i want to use code to do the 'click'

once this is done i need to go back to the file menu and select

c:\crunched.txt

from there i can grab the text file and have my vb prog take it from there