private void pictureBox2_Click(object sender, EventArgs e)
{
frmManagePurchase fm = new frmManagePurchase();
fm.MdiParent = this.MdiParent;
fm.Show();
this.Close();
}
private void managePurchaseToolStripMenuItem_Click(object sender, EventArgs e)
{
CloseAll();
frmManagePurchase fmUser = new frmManagePurchase();
fmUser.MdiParent = this;
fmUser.Show();
}