unit shellUnit;

interface

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

const
WM_MYICONNOTIFY = WM_USER + 123;

type
TForm1 = class(TForm)
PopupMenu1: TPopupMenu;
RestoreItem: TMenuItem;
N1: TMenuItem;
FileExitItem1: TMenuItem;
HideItem: TMenuItem;
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure RestoreItemClick(Sender: TObject);
procedure HideItemClick(Sender: TObject);
procedure FileExitItem1Click(Sender: TObject);
private
{ Private declarations }
ShownOnce: Boolean;
public
{ Public declarations }
procedure WMICON(var msg: TMessage); message WM_MYICONNOTIFY;
procedure WMSYSCOMMAND(var msg: TMessage); message WM_SYSCOMMAND;
procedure RestoreMainForm;
procedure HideMainForm;
procedure CreateTrayIcon(n: Integer);
procedure DeleteTrayIcon(n: Integer);
end;

var
Form1: TForm1;

implementation

{$R *.DFM}
uses ComObj, activex, ShellApi, shlobj, registry;

procedure TForm1.WMICON(var msg: TMessage);
var P: TPoint;
begin
case msg.LParam of
WM_LBUTTONDOWN:
begin
GetCursorPos(p);
SetForegroundWindow(Application.MainForm.Handle);
PopupMenu1.Popup(P.X, P.Y);
end;
WM_LBUTTONDBLCLK: RestoreItemClick(Self);
end;
end;

procedure TForm1.WMSYSCOMMAND(var msg: TMessage);
begin
inherited;
if (Msg.wParam = SC_MINIMIZE) then HideItemClick(Self);
end;


procedure TForm1.HideMainForm;
begin
Application.ShowMainForm := False;
ShowWindow(Application.Handle, SW_HIDE);
ShowWindow(Application.MainForm.Handle, SW_HIDE);
end;

procedure TForm1.RestoreMainForm;
var i, j: Integer;
begin
Application.ShowMainForm := True;
ShowWindow(Application.Handle, SW_RESTORE);
ShowWindow(Application.MainForm.Handle, SW_RESTORE);
if not ShownOnce then
begin
for I := 0 to Application.MainForm.ComponentCount - 1 do
if Application.MainForm.Components[I] is TWinControl then
with Application.MainForm.Components[I] as TWinControl do
if Visible then
begin
ShowWindow(Handle, SW_SHOWDEFAULT);
for J := 0 to ComponentCount - 1 do
if Components[J] is TWinControl then
ShowWindow((Components[J] as TWinControl).Handle, SW_SHOWDEFAULT);
end;
ShownOnce := True;
end;

end;

procedure TForm1.CreateTrayIcon(n: Integer);
var nidata: TNotifyIconData;
begin
with nidata do
begin
cbSize := SizeOf(TNotifyIconData);
Wnd := Self.Handle;
uID := 1;
uFlags := NIF_ICON or NIF_MESSAGE or NIF_TIP;
uCallBackMessage := WM_MYICONNOTIFY;
hIcon := Application.Icon.Handle;
StrPCopy(szTip, Application.Title);
end;
Shell_NotifyIcon(NIM_ADD, @nidata);
end;

procedure TForm1.DeleteTrayIcon(n: Integer);
var nidata: TNotifyIconData;
begin
with nidata do
begin
cbSize := SizeOf(TNotifyIconData);
Wnd := Self.Handle;
uID := 1;
end;
Shell_NotifyIcon(NIM_DELETE, @nidata);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
ShownOnce := False;
CreateTrayIcon(1);
HideItem.Enabled := False;
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
DeleteTrayIcon(1);
end;

procedure TForm1.RestoreItemClick(Sender: TObject);
begin
RestoreMainForm;
DeleteTrayIcon(1);
RestoreItem.Enabled := False;
HideItem.Enabled := True;
end;

procedure TForm1.HideItemClick(Sender: TObject);
begin
HideMainForm;
CreateTrayIcon(1);
HideItem.Enabled := False;
RestoreItem.Enabled := True;
end;

procedure TForm1.FileExitItem1Click(Sender: TObject);
begin
Close;
end;

end.