xenadmin/XenAdmin/Controls/ConsoleTab/FullScreenHint.cs

/* Copyright (c) Citrix Systems Inc. 
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 *     following disclaimer. 
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using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace XenAdmin.Controls.ConsoleTab
{
    public partial class FullScreenHint : Form
    {
        [DllImport("Gdi32.dll", EntryPoint = "CreateRoundRectRgn")]
        private static extern IntPtr CreateRoundRectRgn
        (
            int nLeftRect, // x-coordinate of upper-left corner
            int nTopRect, // y-coordinate of upper-left corner
            int nRightRect, // x-coordinate of lower-right corner
            int nBottomRect, // y-coordinate of lower-right corner
            int nWidthEllipse, // height of ellipse
            int nHeightEllipse // width of ellipse
         );

        public FullScreenHint(string message)
        {
            InitializeComponent();
            Region = System.Drawing.Region.FromHrgn(CreateRoundRectRgn(0, 0, Width, Height, 20, 20));
            label1.Text = message;
        }

        private void FullScreenHint_Load(object sender, EventArgs e)
        {
            Opacity = 0.0; // fully transparent at first, will only show after 1 ms
            timer1.Interval = 1;
            timer1.Start();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (Opacity == 0.0)
            {
                Opacity = 0.7;
                timer1.Interval = 100;
            }
            else
            {
                if (Opacity > 0.01)
                    Opacity -= 0.01;
                else
                    Close();
            }
        }
    }
}