Friday, June 1, 2007

XPe tip #48: Get rid of System Tray icons and remap the UI

There are some 3rd party applications (and even Microsoft application like BlueTooth systray agent) that install icons in the SysTray area - the right-lower corner of the Desktop screen. Some of these application rely on the presence of that icon to provide a way to access their UI. Unfortunately, often there is no other way left.

When you are trying to get rid of Explorer shell (on some embedded devices that run a custom shell apps it will make sense) you will remove the SysTray ("Notification Area") as well since it is a part of the Explorer application. More precisely it is a part of the TaskBar feature of Explorer Desktop that runs as system shell.

So, the question is how to get rid of the SysTray (the Explorer) but yet have a way to access such application UI? No easy answer.

Here is what I'd suggest (posted my thoughts in this newsgroup thread).

1) The best approach would be to implement the missing Explorer features within your own custom shell application. It is really hard with regards to some features and requires a lot of debugging on XP/XPe to understand how those features work and how to invoke and integrate them into your own application.
Just to encourage you, I've done this for some of the Explorer features such as AutoPlay, Taskbar, Volume Manager and etc.

2) How 3rd party applications install the icons in the System Tray area?
It is basically about about one API function - Shell_NotifyIcon - that is being used by applications to add icons to SysTray area and be able to receive notifications from the shell by user clicks on those icons through the application window procedures (when you call that API you register your window procedure to receive the events). The Shell_NotifyIcon is exported by shell32.dll. Assuming you don't use shell32.dll in your image that is supposed to run a custom shell, you can create your own version of shell32.dll that will expose (export) that function only. Used as a shim it will give you the full control over what and when that application is doing in the UI.

3) Another way, much simpler, is to find out what messages are sent to the application window procedure when user clicks on the application specific icon in SysTray area or selects an item on the appropriate menu shown by the left-[right-]click on the SysTray icon. Knowing those messages and their parameters (likely WM_COMMAND messages) you can always implement them and send them out from your own shell to the 3rd party application being investigated. This way you can "remap" all the functions of the application icon in SysTray to your own UI.
The best way to watch for the messages is to start with Microsoft Spy++ tool. Next steps is to subclass the window (via global hooks in Win32) and watch for the messages through debug output.


Anonymous said...

看房子,買房子,建商自售,自售,台北新成屋,台北豪宅,新成屋,豪宅,美髮儀器,美髮,儀器,髮型,EMBA,MBA,學位,EMBA,專業認證,認證課程,博士學位,DBA,PHD,在職進修,碩士學位,推廣教育,DBA,進修課程,碩士學位,網路廣告,關鍵字廣告,關鍵字,課程介紹,學分班,文憑,牛樟芝,段木,牛樟菇,日式料理, 台北居酒屋,日本料理,結婚,婚宴場地,推車飲茶,港式點心,尾牙春酒,台北住宿,國內訂房,台北HOTEL,台北婚宴,飯店優惠,台北結婚,場地,住宿,訂房,HOTEL,飯店,造型系列,學位,牛樟芝,腦磷脂,磷脂絲胺酸,SEO,婚宴,捷運,學區,美髮,儀器,髮型,牛樟芝,腦磷脂,磷脂絲胺酸,看房子,買房子,建商自售,自售,房子,捷運,學區,台北新成屋,台北豪宅,新成屋,豪宅,學位,碩士學位,進修,在職進修, 課程,教育,學位,證照,mba,文憑,學分班,網路廣告,關鍵字廣告,關鍵字,SEO,关键词,网络广告,关键词广告,SEO,关键词,网络广告,关键词广告,SEO,台北住宿,國內訂房,台北HOTEL,台北婚宴,飯店優惠,住宿,訂房,HOTEL,飯店,婚宴,台北住宿,國內訂房,台北HOTEL,台北婚宴,飯店優惠,住宿,訂房,HOTEL,飯店,婚宴,台北住宿,國內訂房,台北HOTEL,台北婚宴,飯店優惠,住宿,訂房,HOTEL,飯店,婚宴,結婚,婚宴場地,推車飲茶,港式點心,尾牙春酒,台北結婚,場地,結婚,場地,推車飲茶,港式點心,尾牙春酒,台北結婚,婚宴場地,結婚,婚宴場地,推車飲茶,港式點心,尾牙春酒,台北結婚,場地,居酒屋,燒烤,美髮,儀器,髮型,美髮,儀器,髮型,美髮,儀器,髮型,美髮,儀器,髮型,小套房,小套房,進修,在職進修,留學,證照,MBA,EMBA,留學,MBA,EMBA,留學,進修,在職進修,牛樟芝,段木,牛樟菇,關鍵字排名,網路行銷,关键词排名,网络营销,網路行銷,關鍵字排名,关键词排名,网络营销,PMP,在職專班,研究所在職專班,碩士在職專班,PMP,證照,在職專班,研究所在職專班,碩士在職專班,SEO,廣告,關鍵字,關鍵字排名,網路行銷,網頁設計,網站設計,網站排名,搜尋引擎,網路廣告,SEO,廣告,關鍵字,關鍵字排名,網路行銷,網頁設計,網站設計,網站排名,搜尋引擎,網路廣告,SEO,廣告,關鍵字,關鍵字排名,網路行銷,網頁設計,網站設計,網站排名,搜尋引擎,網路廣告,SEO,廣告,關鍵字,關鍵字排名,網路行銷,網頁設計,網站設計,網站排名,搜尋引擎,網路廣告,EMBA,MBA,PMP


Anonymous said...

29047126483369175 I play dofus Replica Watches for one year, I Replica Rolex Watches want to get some Replica Watch kamas to buy Replica Chanel Watches item for my character. So, I search "Replica Swiss Watches" on google and found many website. As Exact Replica Graham Watch the tips from the forum, I just review the Swiss Replica Watches websites and choose some Replica Montblanc Watches quality sites to Replica Cartier Watches compare the price, and go to their Replica Breguet Watches online support to make Replica Breitling Watches the test. And Last Chaos Gold I decide to use Replica BRM Watch at the end. And Tag Heuer Replica Watch that is the Replica IWC Watch beginning..

aa said...