Demo
环境 delphi 6
1、新建DLL 文件，File—New—Other—OK。
代码为：
library ProTestDLL;
{ 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 SysUtils, Classes, Dialogs;
{$R *.res}
Procedure PrintHanYu; begin ShowMessage('动态连接库文件'); end;
exports PrintHanYu;
begin
end.
2、调用DLL文件，编译DLL文件，新建窗体文件，键入代码。
unit Unit1;
interface
uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs;
type TForm1 = class(TForm) procedure FormCreate(Sender: TObject); private { Private declarations } public { Public declarations } end;
var Form1: TForm1;
implementation
{$R *.dfm}
procedure PrintHanYu;external 'proTestDLL.dll';
procedure TForm1.FormCreate(Sender: TObject); begin PrintHanYu; end;
end.
注意：DLL文件必须和主项目文件在同一文件夹下。