}//btnEnter_Click
private void restartCalculator()
{
dblNum1 = 0;
dblNum2 = 0;
dblResult = 0;
ccn = Calculator_Current_Number.leftNumber;
_operation = Calculator_Opertaions.none;
}//restartCalculator
}//FrmCalculator_KeyPress
private void FrmCalculator_Load(object sender, EventArgs e)
{
dblNum1 = 0;
dblNum2 = 0;
dblResult = 0;
_operation = Calculator_Opertaions.none;
ccn = Calculator_Current_Number.leftNumber;
if (Control.IsKeyLocked(Keys.NumLock))
{
btnNumLock.BackColor = Color.Green;
numlock = true;
}//if Num Lock is On
btnEnter.Focus();
}//FrmCalculator_Load
}//apply_key
private void btnAdd_Click(object sender, EventArgs e)
{
if (ccn == Calculator_Current_Number.leftNumber)
{
dblNum1 = double.Parse(lblDisplay.Text);
lblNum1.Text = lblDisplay.Text;
lblDisplay.Text = "";
ccn = Calculator_Current_Number.rightNumber;
_operation = Calculator_Opertaions.add;
lblOperation.Text = "+";
}//if left number
else if (ccn == Calculator_Current_Number.rightNumber)
{
}//else if it is not left number
}//btnAdd_Click
