定义DLL 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, Classes;{$R *.RES}function F_Square(Aparam: Double): Double; stdcall; begin Result := Aparam * Aparam; end;exports F_Square;
end.调用DLL unit Unit1;interfaceuses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls;type TForm1 = class(TForm) Button1: TButton; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end;var Form1: TForm1; type TMyFun = function(aParam: double): Double; stdcall;implementation{$R *.DFM}procedure TForm1.Button1Click(Sender: TObject); var m : TMyFun; h: THandle; begin h := LoadLibrary('Project1.dll'); if h > 32 then begin @m := GetProcAddress(h, 'F_Square'); if not (@m = nil) then ShowMessage(FloatToStr(m(12))); end; FreeLibrary(h); end;end.
这个随便一个delphi书中都有介绍吧
uses
SysUtils,
dialogs,
Classes;
{$R *.RES}
procedure showvalue(value:integer);export;
begin
showmessage(inttostr(value));
end;
exports
showvalue;
begin
end.var
Form1: TForm1;implementation{$R *.DFM}procedure showvalue(value:integer);external 'testdll.dll';procedure TForm1.Button1Click(Sender: TObject);
begin
showvalue(100);
end;
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,
Classes;{$R *.RES}function F_Square(Aparam: Double): Double; stdcall;
begin
Result := Aparam * Aparam;
end;exports
F_Square;
end.调用DLL
unit Unit1;interfaceuses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls;type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;
type TMyFun = function(aParam: double): Double; stdcall;implementation{$R *.DFM}procedure TForm1.Button1Click(Sender: TObject);
var
m : TMyFun;
h: THandle;
begin
h := LoadLibrary('Project1.dll');
if h > 32 then
begin
@m := GetProcAddress(h, 'F_Square');
if not (@m = nil) then
ShowMessage(FloatToStr(m(12)));
end;
FreeLibrary(h);
end;end.
你发的邮件里带有 VBS/Redlof@M 病毒
但是还是要感谢你,谢谢.