private void MIN_Click(object sender, EventArgs e)
{
//this.WindowState = FormWindowState.Minimized;
Bookkeeping.Minimize(this);
}
private void button4_Click(object sender, EventArgs e)
{
Bookkeeping.Minimize(this);
}
private void pictureBox3_Click(object sender, EventArgs e)
{
Bookkeeping.Minimize(this);
}