C#

object result = app.Evaluate("=LEN(\"ABC\")");<br />
double lnVal = app.WorksheetFunction.Ln(System.Math.E);

<br />
private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)<br />
{<br />
	//Write the details<br />
	SaveSchedules();<br />
<br />
	//Check for the password<br />
	if (!(CheckPassword()))<br />
            e.Cancel = true;<br />
	else<br />
	//Hide the notify icon<br />
	    notifyIcon.Visible = false;<br />
}

thanks

SystemEvents.SessionEnding += new SessionEndingEventHandler(OnSessionEnding);
// ...
private void OnSessionEnding(object sender, SessionEndingEventArgs e)
{
  // In your case, you probably don't care about the <code>e.Reason</code>
}

SaveSchedules();
Application.Exit(); //Bypasses the form.Close() method

private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
//Write the details
SaveSchedules();

//Check for the password
if (!(CheckPassword()))
e.Cancel = true;
else
//Hide the notify icon
notifyIcon.Visible = false;
}

Here you will first check <br />
if(bShutdownStarted==true)<br />
// Do nothing<br />
else<br />
// CheckPassword() and other stuff

public Form1()
{
InitializeComponent();
closing = false;
SystemEvents.SessionEnding += new SessionEndingEventHandler(OnSessionEnding);
}

private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
//Write the details
SaveSchedules();

//Check the state variable
if (!(closing))
{
//Check for the password
if (!(CheckPassword()))
e.Cancel = true;
}
}

private void OnSessionEnding(object sender, SessionEndingEventArgs e)
{
//Save the schedules
SaveSchedules();

//Set the state variable
closing = true;
}

private void OnSessionEnding(object sender, SessionEndingEventArgs e)
{
  e.Cancel = !CheckPassword();
}