Как копировать / менять clipboard text без использования VCL?

unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls...;
 
type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    function GetClipBoardText: string;
    procedure SetClipBoardText(const Value: string);
    procedure Open;
    procedure SetBuffer(Format: Word; var Buffer; Size: Integer);
    procedure Adding;
    procedure Clear;
    constructor CreateRes(Ident: Integer);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    FOpenRefCount: Integer;
    FClipboardWindow: HWND;
    FAllocated: Boolean;
    FEmptied: Boolean;
    FMessage: string;
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
 
resourcestring
  SCannotOpenClipboard = 'Cannot open clipboard';
 
implementation
 
 
{$R *.dfm}
 
//Create resource for resourceString
constructor TForm1.CreateRes(Ident: Integer);
begin
  FMessage := LoadStr(Ident);
end;
 
//Status: Adding
procedure TForm1.Adding;
begin
  if (FOpenRefCount <> 0) and not FEmptied then
  begin
    Clear;
    FEmptied := True;
  end;
end;
 
//Empty clipboard
procedure TForm1.Clear;
begin
  Open;
  try
    EmptyClipboard;
  finally
    Close;
  end;
end;
 
//Set buffer
procedure TForm1.SetBuffer(Format: Word; var Buffer; Size: Integer);
var
  Data: THandle;
  DataPtr: Pointer;
begin
  Open;
  try
    Data := GlobalAlloc(GMEM_MOVEABLE + GMEM_DDESHARE, Size);
    try
      DataPtr := GlobalLock(Data);
      try
        Move(Buffer, DataPtr^, Size);
        Adding;
        SetClipboardData(Format, Data);
      finally
        GlobalUnlock(Data);
      end;
    except
      GlobalFree(Data);
      raise;
    end;
  finally
    Close;
  end;
end;
 
//Open the clipboard
procedure TForm1.Open;
begin
  if FOpenRefCount = 0 then
  begin
    FClipboardWindow := Application.Handle;
    if FClipboardWindow = 0 then
    begin
      {$IFDEF MSWINDOWS}
      FClipboardWindow := Classes.AllocateHWnd(MainWndProc);
      {$ENDIF}
      {$IFDEF LINUX}
      FClipboardWindow := WinUtils.AllocateHWnd(MainWndProc);
      {$ENDIF}
      FAllocated := True;
    end;
    if not OpenClipboard(FClipboardWindow) then
      raise Exception.CreateRes(@SCannotOpenClipboard);
    FEmptied := False;
  end;
  Inc(FOpenRefCount);
end;
 
//Get the clipboard text
function TForm1.GetClipBoardText: string;
var
  Data: THandle;
begin
  Open;
  Data := GetClipboardData(CF_TEXT);
  try
    if Data <> 0 then
      Result := PChar(GlobalLock(Data))
    else
      Result := '';
  finally
    if Data <> 0 then GlobalUnlock(Data);
    Close;
  end;
end;
 
procedure TForm1.SetClipBoardText(const Value: string);
begin
  //Set ClipboardText
  SetBuffer(CF_TEXT, PChar(Value)^, Length(Value) + 1);
end;
 
//Get the clipboard text
procedure TForm1.Button1Click(Sender: TObject);
begin
  ShowMessage(GetClipboardText);
end;
 
//Set the clipboard text
procedure TForm1.Button2Click(Sender: TObject);
begin
  SetClipboardText('-> Big-X <-');
end;
 
end.

Взято с сайта https://www.swissdelphicenter.ch/en/tipsindex.php

procedure CopyStringToClipboard(s: string);
var
  hg: THandle;
  P: PChar;
begin
  hg:=GlobalAlloc(GMEM_DDESHARE or GMEM_MOVEABLE, Length(S)+1);
  P:=GlobalLock(hg);
  StrPCopy(P, s);
  GlobalUnlock(hg);
  OpenClipboard(Application.Handle);
  SetClipboardData(CF_TEXT, hg);
  CloseClipboard;
  GlobalFree(hg);
end;
 

DelphiWorld 6.0