2个工程文件 ======================== {dll工程文件,编译产生dll文件} 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 SysUtils, forms, windows, Classes;{$R *.res}procedure HelloDll(Myform:TForm); begin MessageBox(Myform.Handle,'Hello My First Dll','DllMessageBox',MB_OK); end; exports HelloDll; begin end. ================================================= {调用dll函数的工程单元文件,编译后可调用dll文件中的函数}unit dllapp;interfaceuses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls;type TForm1 = class(TForm) Button1: TButton; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end;var Form1: TForm1;implementation{$R *.dfm}procedure HelloDll(Myform:TForm);external 'project1.dll';procedure TForm1.Button1Click(Sender: TObject); begin HelloDll(Form1); end;end.
1.file-->new-->other-->dll wizards生成一个框架,如 library Test; uses WinTypes, WinProcs; begin end. 2.file->new->unit,新建一个unit,再里面写函数(或类) function myAdd(x,y:integer):integer;stdcall; begin result:=x+y; end; 3.把写好的函数放在exports部分,这果文件看起来应该是这样的 library Test; uses WinTypes, WinProcs,myunit in 'myunit'; exports function myAdd(x,y:integer):integer;stdcall; begin end. 4.编译生成DLL文件 5.新建一个工程,在IMPELEMENTATION下声明: function myAdd(x,y:integer):integer;stdcall;external 'Test.dll' 6.调用 procedure button1click(sender:TObject) begin edit1.text:=inttostr(myAdd(1+2)); end;
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{dll工程文件,编译产生dll文件}
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
SysUtils,
forms,
windows,
Classes;{$R *.res}procedure HelloDll(Myform:TForm);
begin
MessageBox(Myform.Handle,'Hello My First Dll','DllMessageBox',MB_OK);
end;
exports
HelloDll;
begin
end.
=================================================
{调用dll函数的工程单元文件,编译后可调用dll文件中的函数}unit dllapp;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.dfm}procedure HelloDll(Myform:TForm);external 'project1.dll';procedure TForm1.Button1Click(Sender: TObject);
begin
HelloDll(Form1);
end;end.
library Test;
uses WinTypes, WinProcs;
begin
end.
2.file->new->unit,新建一个unit,再里面写函数(或类)
function myAdd(x,y:integer):integer;stdcall;
begin
result:=x+y;
end;
3.把写好的函数放在exports部分,这果文件看起来应该是这样的
library Test;
uses WinTypes, WinProcs,myunit in 'myunit';
exports
function myAdd(x,y:integer):integer;stdcall;
begin
end.
4.编译生成DLL文件
5.新建一个工程,在IMPELEMENTATION下声明:
function myAdd(x,y:integer):integer;stdcall;external 'Test.dll'
6.调用
procedure button1click(sender:TObject)
begin
edit1.text:=inttostr(myAdd(1+2));
end;