Ich versuche, ein Formular und ein Frame in Delphi-made DLL nur mit Handles zu erstellen. Das Formular wird normalerweise in der Hostanwendung angezeigt, der Rahmen wird jedoch nicht angezeigt.Delphi Formular in DLL funktioniert, aber Delphi Frame - nicht
Was könnte falsch sein?
Im Folgenden stelle ich ein Stück Code, der sowohl Rahmen und Fenster erzeugt:
library DLL1;
{ 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
System.SysUtils,
System.Classes,
DllMain in 'DllMain.pas',
Winapi.Windows,
Vcl.Forms,
Vcl.Controls {DLLFrame1: TFrame},
DllForm in 'DllForm.pas' {Form1};
{$R *.res}
type
TSingleton = class
private
fra: TDLLFrame1;
frm: TForm1;
class var __instance: TSingleton;
class function __getInstance(): TSingleton; static;
public
class property Instance: TSingleton read __getInstance;
procedure CreateDLLFrame(AppHandle, ParentWindow: HWND);
procedure CreateDLLForm(AppHandle, ParentWindow: HWND);
procedure DestroyDLLFrame();
procedure DestroyDLLForm();
end;
procedure CreateDLLFrame(AppHandle, ParentWindow: HWND); stdcall;
begin
TSingleton.Instance.CreateDLLFrame(AppHandle, ParentWindow);
end;
procedure CreateDLLForm(AppHandle, ParentWindow: HWND); stdcall;
begin
TSingleton.Instance.CreateDLLForm(AppHandle, ParentWindow);
end;
procedure DestroyDLLFrame(); stdcall;
begin
TSingleton.Instance.DestroyDLLFrame();
end;
procedure DestroyDLLForm(); stdcall;
begin
TSingleton.Instance.DestroyDLLForm();
end;
exports
CreateDLLFrame,
CreateDLLForm,
DestroyDLLFrame,
DestroyDLLForm;
procedure TSingleton.CreateDLLFrame(AppHandle, ParentWindow: HWND);
begin
Application.Handle := AppHandle;
fra := TDLLFrame1.CreateParented(ParentWindow);
fra.Show();
end;
procedure TSingleton.DestroyDLLForm();
begin
frm.Free();
end;
procedure TSingleton.DestroyDLLFrame();
begin
fra.Free();
end;
procedure TSingleton.CreateDLLForm(AppHandle, ParentWindow: HWND);
begin
Application.Handle := AppHandle;
frm := TForm1.CreateParented(ParentWindow);
frm.Show();
end;
class function TSingleton.__getInstance(): TSingleton;
begin
if __instance = nil then
__instance := TSingleton.Create();
Result := __instance;
end;
end.
Die DLLFrame:
unit DllMain;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes,
Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ExtCtrls;
type
TDLLFrame1 = class(TFrame)
mmoText: TMemo;
pnlSend: TPanel;
edtSend: TEdit;
btnSend: TButton;
private
public
constructor Create(AOwner: TComponent); override;
end;
implementation
{$R *.dfm}
{ TDLLFrame1 }
constructor TDLLFrame1.Create(AOwner: TComponent);
begin
inherited;
if AOwner = nil then
MessageBox(0, 'Frame owner is NIL', 'Debug', 0)
else
MessageBox(0, PWideChar(AOwner.Name), 'Debug', 0);
end;
end.
Wo ist Ihre Definition für TDLLFrame1? – Dsm
Aktualisiert. Der Code ist jetzt auch da. – Paul
Wie wäre es mit DLLForm.pas? Wie wäre es mit einem Beispielcode, der CreateDLLForm und CreateDLLFrame aufruft? –