While core functionality and usability of the application is always one of the most important aspects, various visual effects may improve the way users feel about a particular application. Even though you may be able to implement purely cosmetic features in an application, it’s important to keep the functionality in mind.
In this VB.NET tip, I show you a way to give users a form that fades out when it’s closed. This isn’t a must-have functionality for applications, but I think this feature is often nice to have so that an application closing doesn’t look abrupt.
Form fade out
In order to make the form fade out, I use the Form’s Opacity property. By default, the Form’s Opacity equals 1. To let the form fade out, I create a look to gradually decrease the Form’s Opacity value until I finally close the form.
To try this out, add a button to the form and add the following code to its click event:
Private Sub FadingForm() Dim iCount As Integer For iCount = 90 To 10 Step -10 Me.Opacity = iCount / 100 Me.Refresh() Threading.Thread.Sleep(50) Next Me.Close() End Sub
Then add the following code to the Form_Load event:
Me.Opacity = 0.99
How it works
On the Form_Load event, I set the Form’s Opacity to 0.99 (or 99%). This is because, on some computers, the code provided would initially create a blink and then let the form fade out. This usually happens when the Form’s Opacity is lowered from 1 down. To prevent this blink before the fade out effect, I set the Form’s Opacity to 0.99 (the difference is not visible to the user) and then fade the form out.
Irina Medvinskaya has been involved in technology since 1996. She has an MBA from Pace University and works as a project manager at Citigroup.
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