library ProjectDll;{ 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 Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, UnitDll in 'UnitDll.pas' {Form1};procedure ProvaChild(ParentApplication: TApplication; ParentForm: TForm); export; stdcall; var Form1: TForm1; DllProc: Pointer; { Called whenever DLL entry point is called }begin Application:=ParentApplication; Form1:=TForm1.Create(ParentForm); Form1.MyParentForm:=ParentForm; Form1.MyParentApplication:=ParentApplication; // windows.SetParent(Form1.Handle,ParentForm.Handle); // Form1.FormStyle:=fsMDIChild; Form1.Show; end;procedure DLLUnloadProc(Reason: Integer); register; begin if Reason = DLL_PROCESS_DETACH then Application:=DllApplication; end;exports ProvaChild;begin DllApplication:=Application; DLLProc := @DLLUnloadProc; end.
unit MainUnit1;interfaceuses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, ToolWin, ComCtrls, Menus;type TMainForm = class(TForm) MainMenu1: TMainMenu; Start: TMenuItem; procedure StartClick(Sender: TObject); private { Private declarations } public { Public declarations } end; T_ProvaChild = procedure (ParentApplication: TApplication; ParentForm: TForm); stdcall;var MainForm: TMainForm;implementation{$R *.DFM}procedure TMainForm.StartClick(Sender: TObject); var DllHandle: THandle; ProcAddr: FarProc; ProvaChild: T_ProvaChild; begin DllHandle := LoadLibrary('ProjectDll'); ProcAddr := GetProcAddress(DllHandle, 'ProvaChild'); if ProcAddr <> nil then begin ProvaChild := ProcAddr; ProvaChild(Application,Self); end; end;end.
在工程中直接加入窗体.
File->New->Form
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
Windows,
Messages,
SysUtils,
Classes,
Graphics,
Controls,
Forms,
Dialogs,
UnitDll in 'UnitDll.pas' {Form1};procedure ProvaChild(ParentApplication: TApplication; ParentForm: TForm); export; stdcall;
var
Form1: TForm1;
DllProc: Pointer; { Called whenever DLL entry point is called }begin
Application:=ParentApplication; Form1:=TForm1.Create(ParentForm);
Form1.MyParentForm:=ParentForm;
Form1.MyParentApplication:=ParentApplication;
// windows.SetParent(Form1.Handle,ParentForm.Handle);
// Form1.FormStyle:=fsMDIChild;
Form1.Show;
end;procedure DLLUnloadProc(Reason: Integer); register;
begin
if Reason = DLL_PROCESS_DETACH then Application:=DllApplication;
end;exports
ProvaChild;begin
DllApplication:=Application;
DLLProc := @DLLUnloadProc;
end.
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, ToolWin, ComCtrls, Menus;type
TMainForm = class(TForm)
MainMenu1: TMainMenu;
Start: TMenuItem;
procedure StartClick(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end; T_ProvaChild = procedure (ParentApplication: TApplication; ParentForm: TForm); stdcall;var
MainForm: TMainForm;implementation{$R *.DFM}procedure TMainForm.StartClick(Sender: TObject);
var
DllHandle: THandle;
ProcAddr: FarProc;
ProvaChild: T_ProvaChild;
begin
DllHandle := LoadLibrary('ProjectDll');
ProcAddr := GetProcAddress(DllHandle, 'ProvaChild');
if ProcAddr <> nil then
begin
ProvaChild := ProcAddr;
ProvaChild(Application,Self);
end;
end;end.