How do you open UserForm1 with a checkbox?

Hello All!

I'm having a bit of trouble getting my UserForm1 to appear when I check an existing checkbox on my worksheet. Right now the Checkbox is used to hide and unhide 3 rows of cells. I would like to modify that checkbox so that when clicked it shows the three rows as well as opens my user form. The code that I am attempting to weld together is:

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Please give me a hand if you can. As always, any help, advice, opinions, etc. are appreciated.

Thanks!

Thanks for the help. I realized what I was flubbing up. Thanks!