private void toolStripButton1_Click(object sender, EventArgs e)
{
frmImportacion imp = new frmImportacion();
imp.MdiParent = this;
//imp.Show();
OpenSubForm(imp);
}
private void ToolImportaciones_Click(object sender, EventArgs e)
{
frmImportacion imp = new frmImportacion();
imp.MdiParent = this;
OpenSubForm(imp);
}