[youssefbasha]

...::Tutorial::...
Hello, 
I am here to make you know how to make a simple calculator from "Visual Basic" (Calculate the Cercomfrence)
First Add 2 Labels
Second Add 2 Textboxs
Edit The Property "Text" Of Label 1 to Num 1
Edit The Property "Text" Of Label 2 to Num 2
And Click in the first text box double click and type in the Code Window that appears when you press double click
dim r as single
r = textbox1.text
textbox2.text = 3.14*r*r
And then press F5 To Test the program and this in problem solving stages "Program Testing".
Images: https://imgur.com/a/eGAQ4
Link Of My App: https://www.solidfiles.com/v/aW6vza87558v3

That's All 
Have Fun With It
Regards,
YoUsSeFbAsHa.