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    <p>I have developed a simple <code>PleaseWait</code> class 2 years ago, but I didn't update this class, It works very well, have look hope this will give you an idea to implement your logic.</p> <pre><code>public partial class frmWait : Form { public frmWait() { InitializeComponent(); } bool _isMoving = false; int _moveStart_x = 0; int _moveStart_y = 0; private void tmrProgress_Tick(object sender, EventArgs e) { if (barProgress.Value == barProgress.Maximum) barProgress.Value = barProgress.Minimum; else barProgress.Value += 1; } private void btnCancel_Click(object sender, EventArgs e) { Close(); PleaseWait.Abort(); } protected override CreateParams CreateParams { get { System.Windows.Forms.CreateParams p = base.CreateParams; p.ClassStyle += 0x20000; p.ExStyle += 0x8000000; return p; } } protected override void WndProc(ref Message m) { const int WM_NCHITTEST = 132; base.WndProc(ref m); switch (m.Msg) { case WM_NCHITTEST: if (m.Result.ToInt32() == 1) m.Result = new IntPtr(2); break; } } private void panelEx1_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { _isMoving = true; _moveStart_x = e.X; _moveStart_y = e.Y; } } private void panelEx1_MouseUp(object sender, MouseEventArgs e) { _isMoving = false; } private void pnlContainer_MouseMove(object sender, MouseEventArgs e) { if (_isMoving) this.Location = new Point(Location.X + e.X - _moveStart_x, Location.Y + e.Y - _moveStart_y); } } public class PleaseWait { #region Static Operations private static Boolean _isAborted = false; private static Boolean _isVisible = false; private static frmWait _waitForm; private static String _waitingState = ""; private static Boolean _autoClose = false; private static Boolean _cancelable = false; private static System.Threading.Thread _waiterThred; public delegate void CancelButtonPressed(); public static event CancelButtonPressed OnCancel; public static Boolean AutoClose { get { return PleaseWait._autoClose; } set { PleaseWait._autoClose = value; } } public static string WaitingState { get { return PleaseWait._waitingState; } set { PleaseWait._waitingState = value; } } public static bool IsVisible { get { return _isVisible; } internal set { _isVisible = value; } } public static void ShowPleaseWait() { ShowPleaseWait("", _autoClose, false); } public static void ShowPleaseWait(string waitingState) { ShowPleaseWait(waitingState, _autoClose, false); } public static void ShowPleaseWait(bool autoClose) { ShowPleaseWait("", autoClose, false); } public static void ShowPleaseWait(string waitingState, bool autoClose, bool cancelable) { if (_waiterThred != null) { if (_isVisible) { // the please wait it woking, just continue and apply the changes _waitingState = waitingState; _autoClose = autoClose; _cancelable = cancelable; return; } else { _waiterThred.Abort(); _waiterThred = null; } } _waitingState = waitingState; _autoClose = autoClose; _cancelable = cancelable; _isAborted = false; _isVisible = false; if (_autoClose) Application.Idle += new EventHandler(Application_Idle); _waiterThred = new System.Threading.Thread(DisplayWaitingForm); _waiterThred.IsBackground = true; _waiterThred.Name = "Please Wait...."; _waiterThred.Start(); Application.DoEvents(); } public static void Abort() { _isAborted = true; } private static void Application_Idle(object sender, EventArgs e) { if (_autoClose) _isAborted = true; } private static void DisplayWaitingForm() { if (_waitForm != null) { if (!_waitForm.IsDisposed) _waitForm.Dispose(); _waitForm = null; _isVisible = false; } try { if (_isAborted) return; _waitForm = new frmWait(); if (_cancelable) { _waitForm.btnCancel.Enabled = true; _waitForm.btnCancel.Click += new EventHandler(btnCancel_Click); } try { _isVisible = true; _waitForm.Show(); _waitForm.Focus(); while (!_isAborted) { System.Threading.Thread.Sleep(15); _waitForm.lblMessage.Text = _waitingState; Application.DoEvents(); _waitForm.lblMessage.Text = _waitingState; } _isVisible = false; } finally { FreeWaitingForm(); } } finally { _isVisible = false; } } static void btnCancel_Click(object sender, EventArgs e) { if (_waitForm.InvokeRequired) { _waitForm.BeginInvoke(new EventHandler(btnCancel_Click), new object[] { e }); } else { if (OnCancel != null) OnCancel.Invoke(); } } private static void FreeWaitingForm() { _waitingState = ""; _isVisible = false; if (_waitForm == null) { return; } _waitForm.Hide(); if (!_waitForm.IsDisposed) _waitForm.Dispose(); _waitForm = null; } #endregion } </code></pre> <p>use like following code :</p> <pre><code>PleaseWait.ShowPleaseWait("Please wait", true, false); // If second param is true then it will close the form automatically. // If third param is true the it will expose a cancel button, so you can cancel your Asynchronous operations. </code></pre> <p>I didn't insert design code, you can understand by looking at code.</p> <p>hope this help.</p>
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