关掉调用DLL的主窗口时就报告Invalid pointer operation

全文：http://bbs.csdn.net/topics/40485751

亲测如下：

1.在 dll 的 uses 部分添加 ShareMem 单元。例如：

library Project1;

{ 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. }

uses
  ShareMem, SysUtils, IdHTTP,
  Classes;

{$R *.res}

function GetText(Site:string):string; stdcall;
  var
    idhtp1:TIdHTTP;
    HTMLList:TStringList;
begin
  HTMLList := TStringList.Create;
  idhtp1 := TIdHTTP.Create(nil);
  HTMLList.Text := idhtp1.Get(Site);
  Result := HTMLList.Text;
  idhtp1.Free;
  HTMLList.Free;
end;

exports
  GetText;

begin

end.

2.在 exe 的 project->view source、在DPR文件中 uses 部分添加 ShareMem 单元。例如：

program Project11;

uses
  ShareMem, Forms,
  Unit1 in 'Unit1.pas' {Form1};

{$R *.res}

begin
  Application.Initialize;
  Application.CreateForm(TForm1, Form1);
  Application.Run;
end.