C++builder 怎么做ctrl+左键实现多选
如何实现这种事件，多选不用考虑，谢谢了 C++Builder
[解决办法]
我收藏的代码，自己再加工一下：

#ifndef TTS_CLOSE
#define TTS_CLOSE 0x80
#endif

void __fastcall ShowBalloonTip(TWinControl *Control, int nIcon,
        LPSTR lpTitle, LPSTR lpText, TColor clBack, TColor clFore)
{
    HANDLE hWnd = Control->Handle;
    HANDLE hWndTip = CreateWindow(TOOLTIPS_CLASS, NULL,
            WS_POPUP 
[解决办法]
 TTS_NOPREFIX 
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 TTS_BALLOON 
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 TTS_ALWAYSTIP 
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 TTS_CLOSE,
            0, 0, 0, 0, hWnd, 0, HInstance, NULL);
    TOOLINFO ti;
    if(hWndTip != 0)
    {
        SetWindowPos(hWndTip, HWND_TOPMOST, 0, 0, 0, 0,
                SWP_NOACTIVATE 
[解决办法]
 SWP_NOMOVE 
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 SWP_NOSIZE);
        ti.cbSize = sizeof(ti);
        ti.uFlags = TTF_CENTERTIP 
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 TTF_TRANSPARENT 
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 TTF_SUBCLASS;
        ti.hwnd = hWnd; 
 
        ti.lpszText = lpText;
        ::GetClientRect(hWnd, &ti.rect);
        SendMessage(hWndTip, TTM_SETTIPBKCOLOR, clBack, 0);
        SendMessage(hWndTip, TTM_SETTIPTEXTCOLOR, clFore, 0);
        SendMessage(hWndTip, TTM_ADDTOOL, 1, LPARAM(&ti));
        SendMessage(hWndTip, TTM_SETTITLE, nIcon % 4, LPARAM(lpTitle));
    }
}

void __fastcall TForm1::Button1Click(TObject *Sender)
{
    ShowBalloonTip(Button2, 1, "标题", "嘿嘿,最好的Tip控件.", TColor(RGB(245,245,245)), clBlue);
}

点击Button1以后，把鼠标移到Button2上，就会看到惊喜。