How to add tooltips to individual grid cells in a dialog

[Gintaras]

I would show tooltips on LVN_GETINFOTIP message.

This code is in C++, copied from one of my projects.

Code:

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    case LVN_GETINFOTIPW: {
        NMLVGETINFOTIPW& it=*(NMLVGETINFOTIPW*)nh;
        i=it.iItem; if(i<0 || i>=_nr) break;
        text=_GetTooltipText(i);
        if(empty(text)) _TooltipHide();
        else _TooltipShow(text, i);

//__________________________________________________________________

//Shows tooltip at x y relative to _hlv.
void QmDropdown::_TooltipShow(LPCSTR text, int i)
{
    TOOLINFOW ti; ZERO(ti); ti.cbSize=44;
    ti.uFlags=TTF_TRACK;
    ti.lpszText=Wstr(text);

    if(!_htooltip) {
        DWORD st=TTS_NOPREFIX|TTS_ALWAYSTIP|WS_POPUP|TTS_BALLOON;
        _htooltip=CreateWindowExW(WS_EX_TOPMOST|WS_EX_TOOLWINDOW, L"tooltips_class32", 0, st, 0, 0, 0, 0, 0, 0, 0, 0);
        SENDQ(_htooltip, TTM_SETMAXTIPWIDTH, 0, 500); //enable multiline
        SENDQ(_htooltip, TTM_ADDTOOLW, 0, &ti);
    }
    else SENDQ(_htooltip, TTM_UPDATETIPTEXTW, 0, &ti);

    RECT ri={}; _LvSend(LVM_GETITEMRECT, i, (LPARAM)&ri);
    POINT p={ri.right, (ri.top+ri.bottom)/2}; ClientToScreen(_hlv, &p);
    SENDQ(_htooltip, TTM_TRACKPOSITION, 0, MAKELONG(p.x, p.y));
    SENDQ(_htooltip, TTM_TRACKACTIVATE, 1, &ti);
    _isTooltip=1;
}
//__________________________________________________________________

void QmDropdown::_TooltipHide(bool destroy)
{
    if(!_htooltip) return;
    if(_isTooltip) {
        _isTooltip=0;
        TOOLINFOW ti; ZERO(ti); ti.cbSize=44;
        SENDQ(_htooltip, TTM_TRACKACTIVATE, 0, &ti);
    }
    if(destroy) { DestroyWindow(_htooltip); _htooltip=0; }
}

    long _LvSend(UINT message, WPARAM wParam=0, LPARAM lParam=0) { return SendMessageW(_hlv, message, wParam, lParam); }