private void tsmItemHistory_Click( object sender, EventArgs e )
{
Institucion.frm_History history = new Institucion.frm_History();
history.Owner = this;
history.ShowDialog( this );
}
private void tileHistoria_Click( object sender, EventArgs e )
{
Institucion.frm_History his = new Institucion.frm_History();
his.Owner = this;
his.ShowDialog( this );
}