public static Loginfo Login(string ModuleID, string strAuthID, string ServerIP, string ServerPort)
        {
            frm_LoginFrom = new LoginFrom(ModuleID, strAuthID, ServerIP, ServerPort);
            MessageBox.Show("frm_LoginFrom[0]:");
            MessageBox.Show("frm_LoginFrom[2]:" + frm_LoginFrom.ShowDialog(this));
           
            MessageBox.Show("frm_LoginFrom[3]:" + System.Windows.Forms.DialogResult.OK);
            if (frm_LoginFrom.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                MessageBox.Show("frm_LoginFrom[1]:");
                return new Loginfo(frm_LoginFrom.UserID, frm_LoginFrom.PassWord, frm_LoginFrom.IP, frm_LoginFrom.UserGroup, frm_LoginFrom.UserRole);
            }
            else
            {
                return null;
            }
        }

if (frm_LoginFrom.ShowDialog() == System.Windows.Forms.DialogResult.OK)；这段代码在win7下执行是无效的；在ShowDialog（this）写上this后是会报错的，因为这是静态方法，所以this是无效的，求大神们指点....