显示气球提示框

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{=================================================================
功能: 显示气球提示框
参数: Control: 控件; Icon: 显示图标; Title: 标题; Text:提示信息
返回值: 无
备注:
版本: 1.0 2011/06/06 21:05:00
=================================================================}

procedure Pro_ShowBalloonTip(Control: TWinControl; Icon: integer; Title: PAnsiChar; Text:PWideChar);
const
TOOLTIPS_CLASS = 'tooltips_class32';
TTS_ALWAYSTIP = $01;
TTS_NOPREFIX = $02;
TTS_BALLOON = $40;
TTF_SUBCLASS = $0010;
TTF_TRANSPARENT = $0100;
TTF_CENTERTIP = $0002;
TTM_ADDTOOL = $0400 + 50;
TTM_SETTITLE = (WM_USER + 32);
ICC_WIN95_CLASSES = $000000FF;
type
TOOLINFO = packed record
    cbSize: integer;
    uFlags: integer;
    hwnd: THandle;
    uId: integer;
    rect: TRect;
    hinst: THandle;
    lpszText: PWideChar;
    lParam: integer;
end;
var
hWndTip: THandle;
ti: TOOLINFO;
hWnd: THandle;
begin
hWnd := Control.Handle;
hWndTip := CreateWindow(TOOLTIPS_CLASS, nil,
    WS_POPUP or TTS_NOPREFIX or TTS_BALLOON or TTS_ALWAYSTIP,
    0, 0, 0, 0, hWnd, 0, HInstance, nil);
if hWndTip <> 0 then
begin
    SetWindowPos(hWndTip, HWND_TOPMOST, 0, 0, 0, 0,
      SWP_NOACTIVATE or SWP_NOMOVE or SWP_NOSIZE);
    ti.cbSize := SizeOf(ti);
    ti.uFlags := TTF_CENTERTIP or TTF_TRANSPARENT or TTF_SUBCLASS;
    ti.hwnd := hWnd;
    ti.lpszText := Text;
    Windows.GetClientRect(hWnd, ti.rect);
    SendMessage(hWndTip, TTM_ADDTOOL, 1, integer(@ti));
    SendMessage(hWndTip, TTM_SETTITLE, Icon mod 4, Integer(Title));
end;
end;