public Plexiglass(IOU_Helper.Form1 tocover)
{
_form1 = tocover;
InitializeComponent();
//this.DoubleBuffered = true;
this.TransparencyKey = Color.Turquoise;
this.BackColor = Color.Turquoise;
this.Opacity = 0.9; // Tweak as desired
this.FormBorderStyle = FormBorderStyle.None;
this.ControlBox = false;
this.ShowInTaskbar = false;
this.StartPosition = FormStartPosition.Manual;
this.AutoScaleMode = AutoScaleMode.None;
this.Location = tocover.PointToScreen(Point.Empty);
this.ClientSize = tocover.ClientSize;
tocover.LocationChanged += Cover_LocationChanged;
tocover.ClientSizeChanged += Cover_ClientSizeChanged;
this.Show(tocover);
tocover.Focus();
// Disable Aero transitions, the plexiglass gets too visible
if (Environment.OSVersion.Version.Major >= 6)
{
int value = 1;
DwmSetWindowAttribute(tocover.Handle, DWMWA_TRANSITIONS_FORCEDISABLED, ref value, 4);
}
}