Hey everyone

This is a real newbie question. I have simple app that selects a picture and display's that picture in a PictureBox.

I decided to mess with the Opacity Attribute so I added a timer and created this cool effect where the Main Form's Opacity is increased by 20% every 400 miliseconds.

The problem is that now when I click the button that invokes the Select File Dialog Box I'm getting a NullReferenceException error.

 private void tmrClock_Tick(object sender, EventArgs e)
    {
        if (ViewerForm.ActiveForm.Opacity != 1)
        {
        ActiveForm.Opacity = ActiveForm.Opacity + .20;
        }
    }

The error message is pointing to the if statement.

What am I doing wrong?

Thanks