private void main_Load(object sender, EventArgs e)
{
controlContainer.Controls.Clear();
add a = new add();
controlContainer.Controls.Add(a);
}
private void btn_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
panelActive.Height = btn.Height;
panelActive.Top = btn.Top;
controlContainer.Controls.Clear();
UserControl ctr = null;
if (btn == btnAdd)
{
ctr = new add();
}
else if (btn == btnSum)
{
ctr = new summary();
}
controlContainer.Controls.Add(ctr);
}
