iczelion tut23[4]

            .elseif lparam==wm_lbuttondblclk
                invoke sendmessage,hwnd,wm_command,idm_restore,0
            .endif
        .endif
    .else
        invoke defwindowproc,hwnd,umsg,wparam,lparam
        ret
    .endif
    xor eax,eax
    ret
wndproc endp

end start
 

analysis:

the program will display a simple window. when you press the minimize button, it will hide itself and put an icon into the system tray. when you double-click on the icon, the program will restore itself and remove the icon from the system tray. when you right-click on it, a popup menu is displayed. you can choose to restore the program or exit it.

   .if umsg==wm_create
        invoke createpopupmenu
        mov hpopupmenu,eax
        invoke appendmenu,hpopupmenu,mf_string,idm_restore,addr restorestring
        invoke appendmenu,hpopupmenu,mf_string,idm_exit,addr exitstring

when the main window is created, it creates a popup menu and append two menu items. appendmenu has the following syntax:
 

appendmenu proto hmenu:dword, uflags:dword, uidnewitem:dword, lpnewitem:dword
 

• hmenu is the handle of the menu you want to append the item to
• uflags tells windows about the menu item to be appended to the menu whether it is a bitmap or a string or an owner-draw item, enabled, grayed or disable etc. you can get the complete list from win32 api reference. in our example, we use mf_string which means the menu item is a string.
• uidnewitem is the id of the menu item. this is a user-defined value that is used to represent the menu item.
• lpnewitem specifies the content of the menu item, depending on what you specify in uflags member. since we specify mf_string in uflags member, lpnewitem must contain the pointer to the string to be displayed in the popup menu.

after the popup menu is created, the main window waits patiently for the user to press minimize button.
when a window is minimized, it receives wm_size message with size_minimized value in wparam.

    .elseif umsg==wm_size
        .if wparam==size_minimized
            mov note.cbsize,sizeof notifyicondata
            push hwnd
            pop note.hwnd
            mov note.uid,idi_tray
            mov note.uflags,nif_icon+nif_message+nif_tip
            mov note.ucallbackmessage,wm_shellnotify
            invoke loadicon,null,idi_winlogo
            mov note.hicon,eax
            invoke lstrcpy,addr note.sztip,addr appname
            invoke showwindow,hwnd,sw_hide
            invoke shell_notifyicon,nim_add,addr note