private void InputText(TextBox curBox, string newtxt)
        {
            int    oldpos = curBox.CaretIndex;
            string txt    = curBox.Text;

            if (curBox.SelectionLength > 0)
            {
                oldpos = curBox.SelectionStart;
                txt    = txt.Remove(oldpos, curBox.SelectionLength);
                curBox.SelectionLength = 0;
            }

            if (Uyghur.IsUSozuq(newtxt[0]))
            {
                if ((oldpos == 0) || (oldpos > 0 && (Uyghur.IsUSozuq(txt[oldpos - 1]) || !Uyghur.IsUyghurcheHerp(txt[oldpos - 1])))
                    )
                {
                    //txt = txt.Insert(txtFind.CaretIndex,Uyghur.UYG_UN_HM_6+"");
                    newtxt = Uyghur.UYG_UN_HM_6 + newtxt;
                }
            }
            newtxt            = Uyghur.Tirnaqlar(newtxt, curEditor.RightToLeft);
            txt               = txt.Insert(oldpos, newtxt);
            curBox.Text       = txt;
            curBox.CaretIndex = oldpos + newtxt.Length;
        }
        private void InputText(TextBox curBox, string newtxt)
        {
            int    oldpos = curBox.CaretIndex;
            string txt    = curBox.Text;
            int    inc    = 0;

            if (Uyghur.IsUSozuq(newtxt[0]))
            {
                if ((oldpos == 0) || (oldpos > 0 && (Uyghur.IsUSozuq(txt[oldpos - 1]) || !Uyghur.IsUyghurcheHerp(txt[oldpos - 1])))
                    )
                {
                    txt = txt.Insert(txtFind.CaretIndex, Uyghur.UYG_UN_HM_6 + "");
                    inc++;
                }
            }
            txt = txt.Insert(oldpos + inc, newtxt);
            inc++;
            curBox.Text       = txt;
            curBox.CaretIndex = oldpos + inc;
        }