private void formatoToolStripMenuItem_Click(object sender, EventArgs e)
{
frmDM_Formato o = new frmDM_Formato(null);
o.MdiParent = this;
o.Show();
}
private void btnGoFormato_Click(object sender, EventArgs e)
{
eFORMATO o = new eFORMATO();
o.FOR_codigo = this.cmbFormato.SelectedValue != null?this.cmbFormato.SelectedValue.ToString() : "";
frmDM_Formato o2 = new frmDM_Formato(o);
o2.MdiParent = this.MdiParent;
o2.Show();
}