C#

FrmRequestPwd.Show(true, "Solicite uma senha ao seu representante!");

public partial class FrmRequestPwd : Form
{
    private FrmRequestPwd()
    {
        InitializeComponent();
    }

    public static void Show(bool isError, string msg)
    {
        using (FrmRequestPwd frm = new FrmRequestPwd())
        {
            frm.lblMsg.Text = msg;
            frm.Text = isError ? "Erro" : "Aviso";
            frm.txtSerialHD.Text = Kernel32Managed.GetVolumeSerial('C');
            frm.ShowDialog();
        }
    }

    private void btnOK_Click(object sender, EventArgs e)
    {
        Close();
    }
}