private void Deriveation_Click(object sender, EventArgs e)
{
if (deriveation.Visible == false)
{
try
{
deriveation.Visible = true;
if (j > 0)
{
j--;
}
}
catch (System.ObjectDisposedException)
{
j++;
}
}
else
{
MessageBox.Show("The Window is already opened ", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
if ((j > 0) && (deriveation.Visible == false))
{
deriveation = new Deriveation();
deriveation.Visible = true;
}
}
private void Deriveation_Click(object sender, EventArgs e)
{
if (deriveation.Visible == false)
{
try
{
deriveation.Visible = true;
if (j > 0)
j--;
}
catch (System.ObjectDisposedException)
{
j++;
}
}
else
MessageBox.Show("The Window is already opened ", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
if ((j > 0) && (deriveation.Visible == false))
{
deriveation = new Deriveation();
deriveation.Visible = true;
}
}
