Problem in converting C# code to VB.NET

Question

I have included the coding for Threading in C#. I tried to convert the coding into vb.net but an error saying "Parameter count mismatch" displays. It works very well in C# but I don't know how to resolve the problem. Pls help me resolve the problem. C# code: using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Threading; using System.Timers; namespace TimerSamples { public class frmMain : System.Windows.Forms.Form { private System.Windows.Forms.Timer tmrWindowsFormsTimer; private System.Timers.Timer tmrTimersTimer; private System.Threading.Timer tmrThreadingTimer; private System.Windows.Forms.Button btnStart; private System.Windows.Forms.GroupBox grpTimerClasses; private System.Windows.Forms.Button btnStop; private System.Windows.Forms.ListBox lstTimerEvents; private System.Windows.Forms.RadioButton rbWindowsFormsTimer; private System.Windows.Forms.RadioButton rbTimersTimer; private System.Windows.Forms.RadioButton rbThreadingTimer; private System.Windows.Forms.Button btnSleepThread; private System.ComponentModel.Container components = null; private int _tickEventCounter; private delegate void ShowTimerEventFiredDelegate(DateTime eventTime, string threadName); public frmMain() { InitializeComponent(); InitializeTimers(); } private void InitializeTimers() { //Initialize System.Windows.Forms.Timer (instance members are not thread safe)... tmrWindowsFormsTimer = new System.Windows.Forms.Timer(); tmrWindowsFormsTimer.Interval = 1000; tmrWindowsFormsTimer.Tick += new EventHandler(tmrWindowsFormsTimer_Tick); //Initialize System.Timers.Timer (this type is safe in multi-threaded apps)... tmrTimersTimer = new System.Timers.Timer(); tmrTimersTimer.Interval = 1000; tmrTimersTimer.Elapsed += new ElapsedEventHandler(tmrTimersTimer_Elapsed); //If the Elapsed event handler has UI code, //the SynchronizingObject property of the System.Timers.Timer class //provides an alternative to using BeginInvoke. //tmrTimersTimer.SynchronizingObject = this; //Initialize System.Threading.Timer (instance members are not thread safe)... tmrThreadingTimer = new System.Threading.Timer(new TimerCallback(tmrThreadingTimer_TimerCallback), null, System.Threading.Timeout.Infinite, 1000); } ///

/// Clean up any resources being used. ///

protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code ///

/// Required method for Designer support - do not modify /// the contents of this method with the code editor. ///

private void InitializeComponent() { System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(frmMain)); this.btnStart = new System.Windows.Forms.Button(); this.grpTimerClasses = new System.Windows.Forms.GroupBox(); this.rbThreadingTimer = new System.Windows.Forms.RadioButton(); this.rbTimersTimer = new System.Windows.Forms.RadioButton(); this.rbWindowsFormsTimer = new System.Windows.Forms.RadioButton(); this.lstTimerEvents = new System.Windows.Forms.ListBox(); this.btnStop = new System.Windows.Forms.Button(); this.btnSleepThread = new System.Windows.Forms.Button(); this.grpTimerClasses.SuspendLayout(); this.SuspendLayout(); // // btnStart // this.btnStart.Anchor = (System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right); this.btnStart.Location = new System.Drawing.Point(238, 14); this.btnStart.Name = "btnStart"; this.btnStart.Size = new System.Drawing.Size(110, 23); this.btnStart.TabIndex = 1; this.btnStart.Text = "Start"; this.btnStart.Click += new System.EventHandler(this.btnStart_Click); // // grpTimerClasses // this.grpTimerClasses.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right); this.grpTimerClasses.Controls.AddRange(new System.Windows.Forms.Control[] { this.rbThreadingTimer, this.rbTimersTimer, this.rbWindowsFormsTimer}); this.grpTimerClasses.Location = new System.Drawing.Point(7, 8); this.grpTimerClasses.Name = "grpTimerClasses"; this.grpTimerClasses.Size = new System.Drawing.Size(212, 80); this.grpTimerClasses.TabIndex = 0; this.grpTimerClasses.TabStop = false; this.grpTimerClasses.Text = "Timer Class"; // // rbThreadingTimer // this.rbThreadingTimer.Location = new System.Drawing.Point(12, 56); this.rbThreadingTimer.Name = "rbThreadingTimer"; this.rbThreadingTimer.Size = new System.Drawing.Size(160, 16); this.rbThreadingTimer.TabIndex = 2; this.rbThreadingTimer.Text = "System.Threading.Timer"; // // rbTimersTimer // this.rbTimersTimer.Location = new System.Drawing.Point(12, 32); this.rbTimersTimer.Name = "rbTimersTimer"; this.rbTimersTimer.Size = new System.Drawing.Size(136, 24); this.rbTimersTimer.TabIndex = 1; this.rbTimersTimer.Text = "System.Timers.Timer"; // // rbWindowsFormsTimer // this.rbWindowsFormsTimer.Checked = true; this.rbWindowsFormsTimer.Location = new System.Drawing.Point(12, 16); this.rbWindowsFormsTimer.Name = "rbWindowsFormsTimer"; this.rbWindowsFormsTimer.Size = new System.Drawing.Size(180, 16); this.rbWindowsFormsTimer.TabIndex = 0; this.rbWindowsFormsTimer.TabStop = true; this.rbWindowsFormsTimer.Text = "System.Windows.Forms.Timer"; // // lstTimerEvents // this.lstTimerEvents.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right); this.lstTimerEvents.Location = new System.Drawing.Point(8, 96); this.lstTimerEvents.Name = "lstTimerEvents"; this.lstTimerEvents.Size = new System.Drawing.Size(345, 173); this.lstTimerEvents.TabIndex = 4; // // btnStop // this.btnStop.Anchor = (System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right); this.btnStop.Enabled = false; this.btnStop.Location = new System.Drawing.Point(238, 68); this.btnStop.Name = "btnStop"; this.btnStop.Size = new System.Drawing.Size(110, 23); this.btnStop.TabIndex = 3; this.btnStop.Text = "Stop"; this.btnStop.Click += new System.EventHandler(this.btnStop_Click); // // btnSleepThread // this.btnSleepThread.Anchor = (System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right); this.btnSleepThread.Enabled = false; this.btnSleepThread.Location = new System.Drawing.Point(238, 41); this.btnSleepThread.Name = "btnSleepThread"; this.btnSleepThread.Size = new System.Drawing.Size(110, 23); this.btnSleepThread.TabIndex = 2; this.btnSleepThread.Text = "Sleep"; this.btnSleepThread.Click += new System.EventHandler(this.btnSleepThread_Click); // // frmMain // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(360, 278); this.Controls.AddRange(new System.Windows.Forms.Control[] { this.btnSleepThread, this.lstTimerEvents, this.grpTimerClasses, this.btnStop, this.btnStart}); this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon"))); this.MaximizeBox = false; this.MinimumSize = new System.Drawing.Size(344, 200); this.Name = "frmMain"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; this.Text = "MSDN Magazine - Timer Classes Demo"; this.grpTimerClasses.ResumeLayout(false); this.ResumeLayout(false); } #endregion ///

/// The main entry point for the application. ///

[STAThread] static void Main() { Thread.CurrentThread.Name = "UIThread"; Application.Run(new frmMain()); } private void tmrWindowsFormsTimer_Tick(object sender, System.EventArgs e) { ShowTimerEventFired(DateTime.Now, GetThreadName()); } private void tmrTimersTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e) { //With this timer class, we could also use e.SignalTime instead of DateTime.Now. //ShowTimerEventFired(e.SignalTime, GetThreadName()); ShowTimerEventFired(DateTime.Now, GetThreadName()); } private void tmrThreadingTimer_TimerCallback(object state) { ShowTimerEventFired(DateTime.Now, GetThreadName()); } private string GetThreadName() { if (Thread.CurrentThread.IsThreadPoolThread) return "WorkerThread"; else return Thread.CurrentThread.Name; } private void ShowTimerEventFired(DateTime eventTime, string threadName) { //InvokeRequired will be true when using System.Threading.Timer //or System.Timers.Timer (without a SynchronizationObject)... if (lstTimerEvents.InvokeRequired) { //Marshal this call back to the UI thread (via the form instance)... BeginInvoke(new ShowTimerEventFiredDelegate(ShowTimerEventFired), new object[] {eventTime, threadName}); } else lstTimerEvents.TopIndex = lstTimerEvents.Items.Add(String.Format("--> Timer Event {0} @ {1} on Thread: {2}", ++_tickEventCounter, eventTime.ToLongTimeString(), threadName)); } private void btnStart_Click(object sender, System.EventArgs e) { _tickEventCounter = 0; if (rbWindowsFormsTimer.Checked) tmrWindowsFormsTimer.Start(); //Same as: tmrWindowsFormsTimer.Enabled = true; else if (rbTimersTimer.Checked) tmrTimersTimer.Start(); //Same as: tmrTimersTimer.Enabled = true; else // if (rbThreadingTimer.Checked) tmrThreadingTimer.Change(0, 1000); UpdateControls(true); } private void btnStop_Click(object sender, System.EventArgs e) { if (rbWindowsFormsTimer.Checked) tmrWindowsFormsTimer.Stop(); //Same as: tmrWindowsFormsTimer.Enabled = false; else if (rbTimersTimer.Checked) tmrTimersTimer.Stop(); //Same as: tmrTimersTimer.Enabled = false; else // if (rbThreadingTimer.Checked) tmrThreadingTimer.Change(System.Threading.Timeout.Infinite, System.Threading.Timeout.Infinite); UpdateControls(false); } private void btnSleepThread_Click(object sender, System.EventArgs e) { lstTimerEvents.TopIndex = lstTimerEvents.Items.Add("Sleeping for 5000 ms..."); lstTimerEvents.Refresh(); Thread.Sleep(5000); } private void UpdateControls(bool start) { string timerType = ""; if (rbWindowsFormsTimer.Checked) timerType = rbWindowsFormsTimer.Text; else if (rbTimersTimer.Checked) timerType = rbTimersTimer.Text; else // if (rbThreadingTimer.Checked) timerType = rbThreadingTimer.Text; lstTimerEvents.TopIndex = lstTimerEvents.Items.Add(String.Format("{0} {1} @ {2}", timerType, start ? "Started": "Stopped", DateTime.Now.ToLongTimeString())); grpTimerClasses.Enabled = !start; btnStart.Enabled = !start; btnStop.Enabled = start; btnSleepThread.Enabled = start; Refresh(); } } } Urgent Thanx in advance harry