public UIClass()
{
d1 = new OnDropCallBack(OnDrop);
d2 = new OnDragLeaveCallBack(OnDragLeave);
d3 = new OnDragOverCallBack(OnDragOver);
d4 = new OnDragEnterCallBack(OnDragEnter);
int ww = 640, wh = 510;
Rectangle rect = Lib.CenterWindow(ww, wh);
ltf = new LTFrameNetClass("LTFrame-Canvas", "OLEDragDrop", IntPtr.Zero, Win32DataType.WS_POPUP | Win32DataType.WS_VISIBLE, rect.Left, rect.Top, ww, wh, IntPtr.Zero);
ltf.BindUserFunction("DragWindow", DragWindowFun, 1);
ltf.BindUserFunction("QuitApp", QuitAppFun, 0);
ltf.BindUserFunction("MinWindow", MinWindowFun, 0);
ltf.SetOnDropCallBack(d1);
ltf.SetOnDragLeaveCallBack(d2);
ltf.SetOnDragOverCallBack(d3);
ltf.SetOnDragEnterCallBack(d4);
ltf.loadFile(Lib.GetAppPath + @"./template/Drag2.html");
ltf.EnableDragFrameChangeSize(false);
ltf.MessageLoop();
}