...Build a Multi Screen Emulator?
Author: Carlo Pasolini
{** 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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