Delphi DLL中对主程序某控件赋值问题

[guangming84]

在DLL中，
Text:String;
cxTreeList.FocusedNode.Texts[col] := Text;
赋值后出现内存访问冲突,
其中cxTreeList为主程序的tcxTreeList对象, col为相应的列下标。

[zywuhao]

{ Important note about DLL memory management: ShareMem must be the
first unit in your library's USES clause AND your project's (select
Project-View Source) USES clause if your DLL exports any procedures or
functions that pass strings as parameters or function results. This
applies to all strings passed to and from your DLL--even those that
are nested in records and classes. ShareMem is the interface unit to
the BORLNDMM.DLL shared memory manager, which must be deployed along
with your DLL. To avoid using BORLNDMM.DLL, pass string information
using PChar or ShortString parameters. }
以上是建立DLL工程时候的说明、
最后一句说，给Dll传值的时候只能用Pchar和ShortString类型参数。
避免使用BORLNDMM.DLL ，传递字符串信息使用PChar或ShortString参数。

[guangming84]

这个值是在DLL内部定义的。。不是从外部传入，应该可以赋值的，，而且值是可以赋给了，但是控件刷新时就出现内存访问冲突了！