Tool tip goes away and comes back on ListView

I am testing if it is possible to have a tool tip show up on top of a ListView Group Header. The following code works, which is in the subclass procedure for the ListView. The main issue I'm asking about is when I move away from the group header, ie to a list item, the tool tip goes away then comes back until it times out normally.

I also found if I come in right from the start (not on a group header), it pops up again on the call:

SendMessage(info->hToolTip, TTM_TRACKACTIVATE, FALSE, (LPARAM)&info->ToolInfo);

Is there a way to prevent the tool tip from showing up again?

    case WM_MOUSEMOVE: {            auto info = reinterpret_cast<SubclassInfo*>(dwRefData);            if (info) {                // get mouse position                POINT pt = { LOWORD(lParam), HIWORD(lParam) };                // total groups                int groupCount = SendMessage(hWnd, LVM_GETGROUPCOUNT, 0, 0);                for (int groupId = 1; groupId <= groupCount; ++groupId) {                    // group header rectangle only                    RECT grpRect;                    if (ListView_GetGroupRect(hWnd, groupId, LVGGR_HEADER, &grpRect)) {                        if (PtInRect(&grpRect, pt)) {                            // Mouse is over this group's header                            currentGroupId = groupId;                              SendMessage(info->hToolTip, TTM_TRACKPOSITION, 0, MAKELPARAM(pt.x, pt.y));                            SendMessage(info->hToolTip, TTM_TRACKACTIVATE, TRUE, (LPARAM)&info->ToolInfo);                            return DefSubclassProc(hWnd, uMsg, wParam, lParam);                        }                    }                }                // Deactivate tooltip if not over any header                SendMessage(info->hToolTip, TTM_TRACKACTIVATE, FALSE, (LPARAM)&info->ToolInfo);            }            break;    }