unit Clipvuu;
interface
uses
SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics,
Controls, Forms, Dialogs, StdCtrls, ExtCtrls;
type
TForm1 = class(TForm)
Memo1: TMemo;
ScrollBox1: TScrollBox;
Image1: TImage;
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
private
{ Private declarations }
PrevHwnd : Hwnd;
procedure WMChangeCBChain(VAR Msg: TWMChangeCBChain);
message WM_CHANGECBCHAIN;
procedure WMDrawClipboard(VAR Msg: TWMDrawClipboard);
message WM_DRAWCLIPBOARD;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
uses ClipBrd;
{$R *.DFM}
procedure TForm1.FormCreate(Sender: TObject);
begin
PrevHwnd := SetClipboardViewer(Handle);
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
ChangeClipboardChain(Handle, PrevHwnd);
end;
procedure TForm1.WMChangeCBChain(VAR Msg: TWMChangeCBChain);
begin
{If previous viewer is being removed, "patch" around it}
IF PrevHWnd = Msg.Remove THEN PrevHWnd := Msg.Next;
{If not SELF being removed, pass along the message}
IF Msg.Remove <> Handle THEN
SendMessage(PrevHWnd, WM_CHANGECBCHAIN, Msg.Remove, Msg.Next);
end;
procedure TForm1.WMDrawClipboard(VAR Msg: TWMDrawClipboard);
VAR H : THandle;
begin
{pass along the message}
WITH TMessage(Msg) DO
SendMessage(PrevHWnd, WM_DRAWCLIPBOARD, wParam, lParam);
IF Clipboard.HasFormat(CF_PICTURE) THEN
BEGIN
ScrollBox1.BringToFront;
Image1.Picture.Assign(Clipboard);
END
ELSE IF Clipboard.HasFormat(CF_TEXT) THEN
BEGIN
Memo1.BringToFront;
Memo1.Font.Color := clWindowText;
{$IFDEF Win32}
Memo1.Text := Clipboard.AsText;
{$ELSE}
H := Clipboard.GetAsHandle(CF_TEXT);
Memo1.SetTextBuf(GlobalLock(H));
GlobalUnlock(H);
{$ENDIF}
END
ELSE
BEGIN
Memo1.BringToFront;
Memo1.Font.Color := clGrayText;
Memo1.Lines.Insert(0,'(no text or bitmap in clipboard)');
END;
Msg.Result := 0;
end;
end.