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Как сделать Multi Screen Emulator?

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{** Building a multi screen emulator ***

 I want to present a simple multi-screen emulator written in Delphi.
 It consists in a little Form placing in the bottom-right corner of the screen,
 right above the traybar, which consists of 5 buttons.
 At the beginning the first button is down; then, when I press another button,
 a new fresh desktop is opened. In this new desktop I can open other programs
 and so on with the other buttons. When I go back to one of the buttons,
 I will see only the applications opened in that contest without the others.
 The trick is to make the following steps just before pressing another button:

 1)Get the handles of all the visible windows (except for Desktop,
 Taskbar and the application itself)
 2)Hiding all the windows detecting at step 1).

 After pressing the button we must:

 1)Show all the windows whose handles we got when we left
   the button itself by pressing another.
   Of course if a button is pressed for the first time we have no
   handles so we will have a new fresh desktop.

 I want to retrieve the handles of all the visible windows:
 the key is a call to the "EnumWindows" procedure
 passing as a parameter a callback function called for example "EnumWindowsProc".
 This callback function must be of the following type:
}

function EnumWindowsProc(hWnd: HWND; lParam: LPARAM): Bool;

// The EnumWindows function is of type:

BOOL EnumWindows(
WNDENUMPROC lpEnumFunc, // pointer to callback function
    LPARAM lParam  // application-defined value
   );

{
 I will call EnumWindows(@EnumWindowsProc, 0);

 The "EnumWindows" function loop over all windows (visible or invisible):
 for each window there is a call to the callback function
 "EnumWindowsProc" wich must be implemented.
 The first param "hWnd" is the handle of the current window.
 A possible implementation of the "EnumWindowsProc" function may be the inserting
 of every handle in a list.
 According to our target we must insert in a list the handle of
 the following windows:


 1)Visible windows //(IsWindowVisible(hwnd) = True)
 2)Not my application window
 //var processed: DWORD;
 //GetWindowThreadProcessID( hwnd, @processID );
 //processID <> GetCurrentProcessID
 3)Not the taskbar window //hWnd <> FindWindow('Shell_TrayWnd', Nil)
 4)Not the desktop window //hWnd <> FindWindow('Progman', Nil)
}

// This is the code:

unit ProcessView;

interface

uses
 Windows, Dialogs, SysUtils, Classes, ShellAPI, TLHelp32, Forms;

var
 HandleList: TStringList;

function EnumWindowsProc(hWnd: HWND; lParam: lParam): Bool; stdcall;
procedure GetProcessList;

implementation

procedure GetProcessList;
var
 i: integer;
begin
 HandleList.Clear;
 EnumWindows(@EnumWindowsProc, 0);
end;

function EnumWindowsProc(hWnd: HWND; lParam: lParam): Bool;
var
 processID: DWORD;
begin
 GetWindowThreadProcessID(hwnd, @processID);
 if processID <> GetCurrentProcessID then
   if (hWnd <> FindWindow('Shell_TrayWnd', nil)) and
     (hWnd <> FindWindow('Progman', nil)) then
     if IsWindowVisible(hwnd) then
     begin
       HandleList.Add(IntToStr(HWnd));
       Result := True;
     end;
end;

initialization
 HandleList := TStringList.Create;

finalization
 HandleList.Free;
end.

{
 In the main program I used a variable named Monitors of type
 "array of TstringList" whose dimension is given by the number of buttons
 (different monitors available) to keep in memory all the hanldes
 associated with every button. Another variable named CurrentMonitor
 keeps in memory the index of the actual monitor (the caption of the button).
 This is the code:
}

unit Unit1;

interface

uses
 Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, ProcessView,
 StdCtrls, Buttons, abfComponents, Menus, ImgList, AppEvnts, TrayIcon;

type
 TForm1 = class(TForm)
   //these are the buttons (1..5) to switch from a monitor to another ///
   SpeedButton1: TSpeedButton;
   SpeedButton2: TSpeedButton;
   SpeedButton3: TSpeedButton;
   SpeedButton4: TSpeedButton;
   SpeedButton5: TSpeedButton;
   ///////////////////////////////////////////////////////////////////////

   ImageList1: TImageList; //ImageList connected to the Popup menu
   PopupMenu1: TPopupMenu; //popup menu displayed by the trayicon

   //PopupMenu Items///////
   ShowApplication: TMenuItem; //Show the form
   HideApplication: TMenuItem; //Hide the form
   N1: TMenuItem; // -
   CloseApplication: TMenuItem; //Close the application
   ////////////////////////////////

   TrayIcon1: TTrayIcon; //my TrayIcon component; you can use yours
   procedure SpeedButton1Click(Sender: TObject);
   procedure FormCreate(Sender: TObject);
   procedure FormDestroy(Sender: TObject);
   procedure FormClose(Sender: TObject; var Action: TCloseAction);
   procedure FormShow(Sender: TObject);
   procedure ShowApplicationClick(Sender: TObject);
   //click on ShowApplication (TMenuItem)
   procedure HideApplicationClick(Sender: TObject);
   //click on HideApplication (TMenuItem)
   procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
   procedure CloseApplicationClick(Sender: TObject);
   //click on CloseApplication (TMenuItem)
 private
   { Private declarations }
   Monitors: array[1..5] of TStringList;
   CurrentMonitor: Integer;
 public
   { Public declarations }
 end;

var
 Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.SpeedButton1Click(Sender: TObject);
var
 i: integer;
 Rect: TRect;
begin
 //
 GetProcessList;

 Monitors[CurrentMonitor].Assign(HandleList);

 for i := 0 to HandleList.Count - 1 do
 begin
   ShowWindow(StrToInt(HandleList.Strings[i]), SW_HIDE);
 end;

 CurrentMonitor := StrToInt((Sender as TSpeedButton).Caption);
 for i := 0 to Monitors[CurrentMonitor].Count - 1 do
 begin
   ShowWindow(StrToInt(Monitors[CurrentMonitor].Strings[i]), SW_SHOW);
 end;
end;

procedure TForm1.FormCreate(Sender: TObject);
var
 i: integer;
begin
 //
 ShowWindow(Application.Handle, SW_HIDE);
 SetWindowLong(Application.Handle,
   GWL_EXSTYLE, GetWindowLong(Application.Handle, GWL_EXSTYLE) and
   not WS_EX_APPWINDOW or WS_EX_TOOLWINDOW);
 ShowWindow(Application.Handle, SW_SHOW);

 CurrentMonitor := 1;
 for i := Low(Monitors) to High(Monitors) do
   Monitors[i] := TStringList.Create;
end;

procedure TForm1.FormDestroy(Sender: TObject);
var
 i: integer;
begin
 //
 for i := Low(Monitors) to High(Monitors) do
   Monitors[i].Free;
end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
var
 i, j: integer;
begin
 for i := Low(Monitors) to High(Monitors) do
 begin
   for j := 0 to Monitors[i].Count - 1 do
   begin
     ShowWindow(StrToInt(Monitors[i].Strings[j]), SW_SHOW);
   end;
 end;
end;

procedure TForm1.FormShow(Sender: TObject);
begin
 //
 Height := 61;
 Width  := 173;
 Top := Screen.Height - Height - 30;
 Left := Screen.Width - Width;
end;

procedure TForm1.ShowApplicationClick(Sender: TObject);
begin
 //
 Application.MainForm.Show;
end;

procedure TForm1.HideApplicationClick(Sender: TObject);
begin
 //
 Application.MainForm.Hide;
end;

procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
 //
 if MessageDlg('Do you want to close Monitors?', mtConfirmation,
   [mbOK, mbCancel], 0) = mrCancel then
   CanClose := False;
end;

procedure TForm1.CloseApplicationClick(Sender: TObject);
begin
 Close;
end;

end.

{
 In order to prevent multiple instances of the application I inserted
 some lines of code inside the project source;
 this is the modified source:
}
program Project1;

uses
 Forms,
 Windows,
 Unit1 in 'Unit1.pas' {Form1};

{$R *.RES}

var
 atom: integer;
begin
 if GlobalFindAtom('Monitors_Procedure_Atom') = 0 then
   atom := GlobalAddAtom('Monitors_Procedure_Atom')
 else
   Exit;

 Application.Initialize;
 Application.CreateForm(TForm1, Form1);
 Application.Run;

 GlobalDeleteAtom(atom);
end.

{
 The GlobalAddAtom function adds a character string to the global atom table
 and returns a unique value (an atom) identifying the string.

 The GlobalFindAtom function searches the global atom table for the
 specified character string and retrieves the global atom associated with that string.

 If I have already run the programm then the GlobalFindAtom function returns a value
 <> 0 because the atom is already present: in this case I abort the execution of the program.
 Instead, if the GlobalFindAtom function returns 0 then this is the first time I run the
 program, so I create the atom. At the end I delete the atom.

 In order to remove the button on the taskbar I inserted the following code
 inside the OnCreate event of the form:
}

{...}
ShowWindow( Application.handle, SW_HIDE );
SetWindowLong( Application.handle,
              GWL_EXSTYLE,
              GetWindowLong( application.handle, GWL_EXSTYLE ) and
              not WS_EX_APPWINDOW or WS_EX_TOOLWINDOW);
ShowWindow( Application.handle, SW_SHOW );
{...}


{
 In order to have a tray icon in the traybar (wich display a menu containing showing,
 hiding and closing of the form), I used a component (TTrayIcon),
 I built a year ago; this is the source:
}

unit TrayIcon;

interface

uses
 Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  ShellAPI, extctrls, Menus;

const
    WM_SYSTEM_TRAY_NOTIFY = WM_USER + 1;

type TTrayIconMessage =(imClick, imDoubleClick, imMouseDown,
                       imMouseUp, imLeftClickUp, imLeftDoubleClick,
                       imRightClickUp, imRightDoubleClick, imNone);

type
 TTrayIcon = class(TComponent)
 private
   { Private declarations }
  FData: TNotifyIconData;
  FIsClicked: Boolean;
  FIcon: TIcon;
  FIconList: TImageList;
  FPopupMenu: TPopupMenu;
  FTimer: TTimer;
  FHint: string;
  FIconIndex: integer;
  FVisible: Boolean;
  FHide: Boolean;
  FAnimate: Boolean;
  FAppRestore: TTrayIconMessage;
  FPopupMenuShow: TTrayIconMessage;
  FApplicationHook: TWindowHook;

  FOnMinimize: TNotifyEvent;
  FOnRestore: TNotifyEvent;
  FOnMouseMove: TMouseMoveEvent;
  FOnMouseExit: TMouseMoveEvent;
  FOnMouseEnter: TMouseMoveEvent;
  FOnClick: TNotifyEvent;
  FOnDblClick: TNotifyEvent;
  FOnMouseDown: TMouseEvent;
  FOnMouseUp: TMouseEvent;
  FOnAnimate: TNotifyEvent;
  FOnCreate: TNotifyEvent;
  FOnDestroy: TNotifyEvent;
  FOnActivate: TNotifyEvent;
  FOnDeactivate: TNotifyEvent;

  procedure SetHint(Hint: string);
  procedure SetHide(Value: Boolean);
  function GetAnimateInterval: integer;
  procedure SetAnimateInterval(Value: integer);
  function GetAnimate: Boolean;
  procedure SetAnimate(Value: Boolean);
  procedure EndSession;

  function ShiftState: TShiftState;

 protected
   { Protected declarations }
  procedure SetVisible(Value: Boolean); virtual;

  procedure DoMessage(var Message: TMessage);virtual;
  procedure DoClick; virtual;
  procedure DoDblClick; virtual;
  procedure DoMouseMove(Shift: TShiftState; X: integer; Y: integer); virtual;
  procedure DoMouseDown(Button: TMouseButton; Shift: TShiftState; X: integer; Y: integer); virtual;
  procedure DoMouseUp(Button: TMouseButton; Shift: TShiftState; X: integer; Y: integer); virtual;
  procedure DoOnAnimate(Sender: TObject); virtual;
  procedure Notification(AComponent: TComponent; Operation: TOperation); override;

  function ApplicationHookProc(var Message: TMessage): Boolean;

  procedure Loaded(); override;

  property Data: TNotifyIconData read FData;

 public
   { Public declarations }
  constructor Create(Owner: TComponent); override;
  destructor Destroy; override;

  procedure Minimize(); virtual;
  procedure Restore(); virtual;
  procedure Update(); virtual;
  procedure ShowMenu(); virtual;
  procedure SetIconIndex(Value: integer); virtual;
  procedure SetDefaultIcon(); virtual;
  function GetHandle():HWND;

 published
   { Published declarations }
  property Visible: Boolean  read FVisible write SetVisible default false;
  property Hint: string  read FHint write SetHint;
  property PopupMenu: TPopupMenu read FPopupMenu write FPopupMenu;
  property Hide: Boolean read  FHide write SetHide;
  property RestoreOn: TTrayIconMessage read FAppRestore write FAppRestore;
  property PopupMenuOn: TTrayIconMessage read FPopupMenuShow write FPopupMenuShow;
  property Icons: TImageList read FIconList write FIconList;
  property IconIndex: integer read FIconIndex write SetIconIndex default 0;
  property AnimateInterval: integer read GetAnimateInterval write SetAnimateInterval default 1000;
  property Animate: Boolean read GetAnimate write SetAnimate default false;
  property Handle: HWND read GetHandle;

  // Events
  property OnMinimize: TNotifyEvent read FOnMinimize write FOnMinimize;
  property OnRestore: TNotifyEvent read FOnRestore write FOnRestore;
  property OnClick: TNotifyEvent read FOnClick write FOnClick;
  property OnMouseEnter: TMouseMoveEvent read FOnMouseEnter write FOnMouseEnter;
  property OnMouseExit: TMouseMoveEvent read FOnMouseExit write FOnMouseExit;
  property OnMouseMove: TMouseMoveEvent read FOnMouseMove write FOnMouseMove;
  property OnMouseUp:TMouseEvent read FOnMouseUp write FOnMouseUp;
  property OnMouseDown: TMouseEvent read FOnMouseDown write FOnMouseDown;
  property OnAnimate: TNotifyEvent read FOnAnimate write FOnAnimate;
  property OnCreate: TNotifyEvent read FOnCreate write FOnCreate;
  property OnDestroy: TNotifyEvent read FOnDestroy write FOnDestroy;
  property OnActivate: TNotifyEvent read FOnActivate write FOnActivate;
  property OnDeactivate: TNotifyEvent read FOnDeactivate write FOnDeactivate;

 end;

procedure Register;

implementation

procedure Register;
begin
 RegisterComponents('Carlo Pasolini', [TTrayIcon]);
end;

constructor TTrayIcon.Create(Owner: TComponent);
begin
  inherited;

  FIcon := TIcon.Create();
  FTimer := TTimer.Create(nil);

  FIconIndex := 0;
  FIcon.Assign(Application.Icon);
  FAppRestore := imDoubleClick;
  FOnAnimate := DoOnAnimate;
  FPopupMenuShow := imNone;
  FVisible := false;
  FHide := true;
  FTimer.Enabled := false;
  FTimer.OnTimer := OnAnimate;
  FTimer.Interval := 1000;

  if not (csDesigning in ComponentState) then
     begin
          FillChar(FData, sizeof(TNotifyIconData), #0);
//           memset(&FData, 0, sizeof(TNotifyIconData));
          FData.cbSize := sizeof(TNotifyIconData);
          FData.Wnd := AllocateHWnd(DoMessage);
          FData.uID := UINT(Self);
          FData.hIcon := FIcon.Handle;
          FData.uFlags := NIF_ICON or NIF_MESSAGE;
          FData.uCallbackMessage := WM_SYSTEM_TRAY_NOTIFY;

          FApplicationHook := ApplicationHookProc;
          Update;
     end;

end;

//---------------------------------------------------------------------------
destructor TTrayIcon.Destroy();
begin
  if not (csDesigning in ComponentState) then
     begin
          Shell_NotifyIcon(NIM_DELETE, @FData);  //booh forse @FData
          DeallocateHWnd(FData.Wnd);
     end;

  if (Assigned(FIcon)) then
     FIcon.Free;

  if (Assigned(FTimer)) then
     FTimer.Free;

  inherited;
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.Notification(AComponent: TComponent; Operation: TOperation);
begin
 inherited Notification(AComponent, Operation);

 if Operation = opRemove then
    begin
         if (AComponent = FIconList) then
            FIconList := nil
         else
            if (AComponent = FPopupMenu) then
               FPopupMenu := nil;
    end;
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.Loaded();
begin
  inherited Loaded();

  if (not Assigned(FIconList)) then
     begin
          FAnimate := false;
          FIcon.Assign(Application.Icon);
     end
  else
     begin
          FTimer.Enabled := FAnimate;
          FIconList.GetIcon(FIconIndex, FIcon);
     end;

  Update();
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.SetVisible(Value: Boolean);
begin
  FVisible := Value;

  if not (csDesigning in ComponentState) then
   begin
     if FVisible then
      begin
        if (not Shell_NotifyIcon(NIM_ADD, @FData)) then
           raise EOutOfResources.Create('Cannot Create System Shell Notification Icon');

        Hide := true;
        Application.HookMainWindow(FApplicationHook);
      end

     else
      begin
        if (not Shell_NotifyIcon(NIM_DELETE, @FData)) then
           raise EOutOfResources.Create('Cannot Remove System Shell Notification Icon');

        Hide := false;
        Application.UnhookMainWindow(FApplicationHook);
      end;
   end;
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.SetHint(Hint: string);
begin
  // The new hint must be different than the previous hint and less than
  // 64 characters to be modified. 64 is an operating system limit.
  if ((FHint <> Hint) and (Length(Hint) < 64)) then
   begin
     FHint := Hint;
     StrPLCopy(FData.szTip, Hint, sizeof(FData.szTip) - 1);

     // If there is no hint then there is no tool tip.
     if (Length(Hint) <> 0) then
        FData.uFlags := FData.uFlags or NIF_TIP
     else
        FData.uFlags := FData.uFlags and (not NIF_TIP);

     Update();
   end;
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.SetHide(Value: Boolean);
begin
  FHide := Value;
end;

//---------------------------------------------------------------------------
function TTrayIcon.GetAnimateInterval(): integer;
begin
  Result := FTimer.Interval;
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.SetAnimateInterval(Value: integer);
begin
  FTimer.Interval := Value;
end;

//---------------------------------------------------------------------------
function TTrayIcon.GetAnimate(): Boolean;
begin
  Result := FAnimate;
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.SetAnimate(Value: Boolean);
begin
  if (Assigned(FIconList) or (csLoading in ComponentState)) then
     FAnimate := Value;

  if (Assigned(FIconList) and (not (csDesigning in ComponentState))) then
     FTimer.Enabled := Value;
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.EndSession();
begin
  Shell_NotifyIcon(NIM_DELETE, @FData);
end;

//---------------------------------------------------------------------------
function TTrayIcon.ShiftState(): TShiftState;
var
  Res: TShiftState;
begin

  Res := [];

  if (GetKeyState(VK_SHIFT) < 0) then
     Res := Res + [ssShift];
  if (GetKeyState(VK_CONTROL) < 0) then
     Res := Res + [ssCtrl];
  if (GetKeyState(VK_MENU) < 0) then
     Res := Res + [ssAlt];

  Result := Res;
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.DoMessage(var Message: TMessage);
var
  point: TPoint;
  shift: TShiftState;
begin

  case (Message.Msg) of
   //begin
     WM_QUERYENDSESSION:
        Message.Result := 1;
        //break;

     WM_ENDSESSION:
        EndSession();
        //break;

     WM_SYSTEM_TRAY_NOTIFY:
        case (Message.LParam) of
         //begin
           WM_MOUSEMOVE:
              if (Assigned(FOnClick)) then
               begin
                 shift := ShiftState();
                 GetCursorPos(point);
                 DoMouseMove(shift, point.x, point.y);
               end;
              //break;

           WM_LBUTTONDOWN:
            begin
              shift := ShiftState();
              shift := shift + [ssLeft];
              GetCursorPos(point);
              DoMouseDown(mbLeft, shift, point.x, point.y);
              FIsClicked := true;
              //break;
            end;

           WM_LBUTTONUP:
             begin
              shift := ShiftState();
              shift := shift + [ssLeft];
              GetCursorPos(point);
              if (Assigned(FOnClick)) then
                 DoClick();

              DoMouseUp(mbLeft, shift, point.x, point.y);

              if (FAppRestore = imLeftClickUp) then
                 Restore();
              if (FPopupMenuShow = imLeftClickUp) then
                 ShowMenu();
              //break;
             end;

           WM_LBUTTONDBLCLK:
             begin
              DoDblClick();

              if (FAppRestore = imLeftDoubleClick) then
                 Restore();
              if (FPopupMenuShow = imLeftDoubleClick) then
                 ShowMenu();
              //break;
             end;

           WM_RBUTTONDOWN:
             begin
              shift := ShiftState();
              shift := shift + [ssRight];
              GetCursorPos(point);
              DoMouseDown(mbRight, shift, point.x, point.y);
              //break;
             end;

           WM_RBUTTONUP:
             begin
              shift := ShiftState();
              shift := shift + [ssRight];
              GetCursorPos(point);

              DoMouseUp(mbRight, shift, point.x, point.y);

              if (FAppRestore = imRightClickUp) then
                 Restore();
              if (FPopupMenuShow = imRightClickUp) then
                 ShowMenu();
              //break;
             end;

           WM_RBUTTONDBLCLK:
             begin
              DoDblClick();

              if (FAppRestore = imRightDoubleClick) then
                 Restore();
              if (FPopupMenuShow = imRightDoubleClick) then
                 ShowMenu();
              //break;
             end;

           WM_MBUTTONDOWN:
             begin
              shift := ShiftState();
              shift := shift + [ssMiddle];
              GetCursorPos(point);

              DoMouseDown(mbMiddle, shift, point.x, point.y);
              //break;
             end;

           WM_MBUTTONUP:
             begin
              shift := ShiftState();
              shift := shift + [ssMiddle];
              GetCursorPos(point);
              DoMouseUp(mbMiddle, shift, point.x, point.y);
              //break;
             end;

           WM_MBUTTONDBLCLK:
              DoDblClick();
              //break;
        end;
  end;

  inherited Dispatch(Message);
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.ShowMenu();
var
  point: TPoint;
begin
  GetCursorPos(point);

  if (Screen.ActiveForm.Handle <> 0) then
     SetForegroundWindow(Screen.ActiveForm.Handle);
  FPopupMenu.Popup(point.x, point.y);

end;

//---------------------------------------------------------------------------
procedure TTrayIcon.DoClick();
begin
  if (FAppRestore = imClick) then
     Restore();
  if (FPopupMenuShow = imClick) then
     ShowMenu();

  if (Assigned(FOnClick)) then
     FOnClick(Self);
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.DoDblClick();
begin
  if (FAppRestore = imDoubleClick) then
     Restore();
  if (FPopupMenuShow = imDoubleClick) then
     ShowMenu();

  if (Assigned(FOnDblClick)) then
     FOnDblClick(Self);
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.DoMouseMove(Shift: TShiftState; X:integer; Y: integer);
begin
  if (Assigned(FOnMouseMove)) then
     FOnMouseMove(Self, Shift, X, Y);
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.DoMouseDown(Button: TMouseButton; Shift: TShiftState;
                                      X: integer; Y: integer);
begin
  if (FAppRestore = imMouseDown) then
     Restore();
  if (FPopupMenuShow = imMouseDown) then
     ShowMenu();

  if (Assigned(FOnMouseDown)) then
     FOnMouseDown(Self, Button, Shift, X, Y);
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.DoMouseUp(Button: TMouseButton; Shift: TShiftState;
                                    X: integer; Y:integer);
begin
  if (FAppRestore = imMouseDown) then
     Restore();
  if (FPopupMenuShow = imMouseDown) then
     ShowMenu();

  if (Assigned(FOnMouseUp)) then
     FOnMouseUp(Self, Button, Shift, X, Y);
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.DoOnAnimate(Sender: TObject);
begin
  if (IconIndex < FIconList.Count) then
     Inc(FIconIndex)
  else
     FIconIndex := 0;

  SetIconIndex(FIconIndex);
  Update();
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.Minimize();
begin
  Application.Minimize();
  ShowWindow(Application.Handle, SW_HIDE);

  if (Assigned(FOnMinimize)) then
     FOnMinimize(Self);
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.Restore();
begin
  Application.Restore();
  ShowWindow(Application.Handle, SW_RESTORE);
  SetForegroundWindow(Application.Handle);

  if (Assigned(FOnRestore)) then
     FOnRestore(Self);
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.Update();
begin
  if not (csDesigning in ComponentState) then
   begin
     FData.hIcon := FIcon.Handle;

     if (Visible = true) then
        Shell_NotifyIcon(NIM_MODIFY, @FData);
   end;
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.SetIconIndex(Value: integer);
begin
  FIconIndex := Value;

  if (Assigned(FIconList)) then
     FIconList.GetIcon(FIconIndex, FIcon);

  Update();
end;

//---------------------------------------------------------------------------
function TTrayIcon.ApplicationHookProc(var Message: TMessage): Boolean;
begin
  if (Message.Msg = WM_SYSCOMMAND) then
   begin
     if (Message.WParam = SC_MINIMIZE) then
        Minimize();
     if (Message.WParam = SC_RESTORE) then
        Restore();
   end;

  Result:= false;
end;

//---------------------------------------------------------------------------
procedure TTrayIcon.SetDefaultIcon();
begin
 FIcon.Assign(Application.Icon);
 Update();
end;

//---------------------------------------------------------------------------
function TTrayIcon.GetHandle(): HWND;
begin
  Result := FData.Wnd;
end;

//---------------------------------------------------------------------------
end.






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