Code:

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.

Code:

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;