private void toolStripDropDownButton4_ButtonClick(object sender, EventArgs e)
        {
            frm_msg_view frmMsgView;

            if (Class1.formMsgViewPrivatePool.ContainsKey(userIdChat))
            {
                frmMsgView = Class1.formMsgViewPrivatePool[userIdChat];
                frmMsgView.Activate();
            }
            else
            {
                frmMsgView = new frm_msg_view(userIdChat, "private");
                Class1.formMsgViewPrivatePool.Add(userIdChat, frmMsgView);
                frmMsgView.Show();
            }
        }
        private void toolStripDropDownButton4_ButtonClick(object sender, EventArgs e)
        {
            frm_msg_view frmMsgView;

            if (Class1.formMsgViewGroupPool.ContainsKey(groupChat.Id))
            {
                frmMsgView = Class1.formMsgViewGroupPool[groupChat.Id];
                frmMsgView.Activate();
            }
            else
            {
                frmMsgView = new frm_msg_view(groupChat.Id, "group");
                Class1.formMsgViewGroupPool.Add(groupChat.Id, frmMsgView);
                frmMsgView.Show();
            }
        }