private void aboutPayrollApplicationToolStripMenuItem_Click(object sender, EventArgs e)
{
AboutPayrollSystem objAbout = new AboutPayrollSystem();
objAbout.MdiParent = this;
objAbout.Show();
}
private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
{
if (aboutPayrollSystem == null)
{
AboutPayrollSystem aboutPayrollSystem = new AboutPayrollSystem();
aboutPayrollSystem.MdiParent = this;
aboutPayrollSystem.Show();
}
else
{
aboutPayrollSystem.Activate();
}
}
private void ShowAboutPayrollForm()
{
if (aboutPayroll == null)
{
aboutPayroll = new AboutPayrollSystem();
aboutPayroll.FormClosed += AboutPayroll_FormClosed;// Call this method after form is closed
aboutPayroll.MdiParent = this;
aboutPayroll.Show();
}
else
{
// If instance is already present, activate it and give it focus
aboutPayroll.Activate();
}
}
// Set form instance to null on form close
private void AboutPayroll_FormClosed(object sender, FormClosedEventArgs e)
{
aboutPayroll = null;
}