Delphi环境使用TrackBar拖动条的实例，拖动实例中的紧身滑块，可改变右侧文字区的高度，拖动水平方向的TrackBar则可改变文本区的宽度，两条TrackBar可随意被拖动，实际使用时，可改变的不只是宽度和方式-Delphi environments the TrackBar drag bar instance, drag tight slider instance, you can change the height of the right side of the text area, the TrackBar Drag the horizontal direction can change the width of the text area, two TrackBar can easily drag actual use, can be changed not only in width and manner