C#

• Windows Forms timers (System.Windows.Forms.Timer class), which you drag in the desinger to your form, set some properties, and write the code for the Tick event handler, and that's it. For your situation, the problem is that if the process is long, it will block your UI thread and your main form will not be responsible.
• Thread timer (System.Threading.Timer). I have never used this one, but from the docs[^] it seems you set a timer, without requiring a form, that will run on another thread. So, your form keeps working normally while another thread does your processing on the background.

If someone knows better, feel free to correct me please!

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public int GetWholeNumber(int numerator, int denominator)
{
	int wholeNumber = 0;
	int tempNumber = Numerator;
	
	while(tempNumber >= Denominator)
	{
		tempNumber -= tempNumber ;
		wholeNumber ++ ;
	}
	
	return wholeNumber;
}

int Numerator = 57 ; //for example
int Denominator = 9; //for example
int wholeNumber = (int) (Numerator / Denominator); //wholeNumber would be 6 here, which is the quotient.

DateTimePicker dtp = ctl as DateTimePicker;
DateTime value = DateTime.MinValue;
if(dtp != null)
{
    value = dtp.Value;
}
else
{
    // Not a DateTimePicker control, react accordingly
}

<br />
// Password is binary - manually convert to a string:<br />
string sPass = "";<br />
object oPass = rk.GetValue("Password", null);<br />
if (oPass != null) <br />
{<br />
  byte[] aPass = (byte[])oPass;<br />
  int i, j;<br />
  for (i = 0; i < aPass.Length; i += 2)<br />
  {<br />
    j = aPass[i] + (aPass[i + 1] * 256);<br />
    sPass += (char)j;<br />
  }<br />
}<br />