自己写的适用于Delphi7环境的TSplitter控件类源代码，因比较喜欢Raize的Splitter控件，于是模仿它用XE的TSplitter代码做了一个，顺便解决TSplitter的Bug：在2007/XE下测试可用。-Control class source code of TSplitter apply to write their own Delphi7 environment, like Raize Splitter control, so to imitate it used the XE' s TSplitter code a way to solve a TSplitter the bug: in 2007/XE under test can be used.