How do you use the data from a combobox located from a different form onto another form

HI everyone i would really appreciate it if you could help me with this problem
so i have a huge problem . i need to use the data stored in a combo box from a form which it is stored in to be used in another form. 
basically im making a roadtrip app at a grade 10 level where on the first form you pick the starting , ending and destination point but when you type show route it opens up onto another form. i wanted to know how can i use the data from the previous comboboxes to make an if and else statement and output the route direction onto a memo.

What I have tried:

<pre>i have tried declaring the starting point and ending point on the OnCreate of the direction form but nothing has worked but there are no errors when i run it.