title: Save and retrieve the value of the variables
body: <p>I am programming a macro in Excel-VBA to perform different calculations by phases within a project.</p>
  
  <p>I need to schedule a way to save the work I have calculated in one form at a time, so I can continue another day.</p>
  
  <p>Is there any way to write all the values of variables that have already been assigned or calculated, in a file (.txt, .dat ...)?</p>
  
  <p>So that the value of the stored variables can be recovered later, and continue working.</p>
  
  <p>It would work as the "save", "save as", "open" buttons. But with the variables entered or calculated in my form.</p>
  
  <p>How can all the variables that already have value be saved?</p>
  
  <p>If I program them to be saved one by one, I get an error as expected, when I try to save a variable that I have not yet calculated ...</p>
  
  <p>Thank you very much for the help!!</p>