Opacity Control

Question

Hi, My opacity control causes a really bad BLACK flicker after the opacity is initially decreased via the trackbar control. Any ideas on how to get rid of the black flicker would be greatly appreciated. PS: I tried calling Invalidate and ReDraw after Opacity is adjusted with no luck. Some of the code... // // trackBar1 // Code located on the fader (opacity) control this.trackBar1.Location = new System.Drawing.Point(26, 14); this.trackBar1.Maximum = 100; this.trackBar1.Minimum = 10; this.trackBar1.LargeChange = 5; this.trackBar1.SmallChange = 5; this.trackBar1.Name = "trackBar1"; this.trackBar1.Size = new System.Drawing.Size(220, 45); this.trackBar1.TabIndex = 0; this.trackBar1.TickFrequency = 10; this.trackBar1.TickStyle = System.Windows.Forms.TickStyle.Both; this.trackBar1.Value = 100; this.trackBar1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.TrackBar1_ValueChanged); private void TrackBar1_ValueChanged(object sender, System.EventArgs e) { if (_OpacityChanged != null)//run event { _OpacityChanged(this.trackBar1.Value); } } // Code located on the main form. User clicks button to bring up control private void faderControl_Click(object sender, EventArgs e) { FaderControl myFaderControl = new FaderControl(); myFaderControl._OpacityChanged += new FaderControl.UpdateOpacity(OnOpacityChanged); myFaderControl.ShowDialog(); } private void OnOpacityChanged(double OpacityValue) { double newOpacityValue = OpacityValue / 100; this.Opacity = newOpacityValue; }