Im looking for a list of commands to execute in run.

Example:
System.Diagnostics.Process.Start("mailto:me@myemai l.com&subject=Request%20Information&body=Request:% 0A%0A%0A%0A%0A%0A%0ACONFIDENTIALITY NOTICE");

The above line works fine, well I want to do this for excel as well, but I
am having trouble finding the commands for a cell in excel. How would a write
information to specific cells in excel using the same process?

what I tried: System.Diagnostics.Process.Start("EXCEL.EXE");
this works fine, but when I tried to find Cell line commands I was unable to
get anything to work.