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How To Hide A Window in TaskBar

, 16 Apr 2004
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This article explains how to hide a window's name in the taskbar while the window itself is still active.

Introduction

Sometimes we may want to make an app which doesn't actually need an annoying box in the taskbar. I hope this snippet will help.

Steps

  1. Global Declaration

    Here is some short explanation about the interface used:

    • DECLARE_INTERFACE(iface) is used to declare an interface that does not derive from a base interface.
    • DECLARE_INTERFACE_(iface, baseiface) is used to declare an interface that does derive from a base interface. This is the one that is used. And the interface will be derived from IUnknown interface.

    And then, let's create an alias definition for the derived interface.

    DECLARE_INTERFACE_(ITaskbarList,IUnknown)
    {
    STDMETHOD(QueryInterface)(THIS_ REFIID riid,LPVOID* ppvObj) PURE;
    STDMETHOD_(ULONG,AddRef)(THIS) PURE;
    STDMETHOD_(ULONG,Release)(THIS) PURE;
    STDMETHOD(ActiveTab)(HWND) PURE;
    STDMETHOD(AddTab)(HWND) PURE;
    STDMETHOD(DeleteTab)(HWND) PURE;
    STDMETHOD(HrInit)(HWND) PURE;
    };
    //alias
    typedef ITaskbarList *LPITaskbarList;
  2. In the Dialog Based Class declaration

    Here is up to you, whether you want to declare the pTaskbar as an attribute of a Dialog class or not. It's not a problem, actually, since the implementation (next step) will only need the window handle (HWND).

    class CMyDlg : public CDialog
    {
    .
    .
    //Init our Taskbar handler
    LPITaskbarList pTaskbar;
    .
    .
    }

    Don't forget to set the pTaskbar to NULL in the construction method for your dialog class.

  3. Initialization
    BOOL CMyDlg::OnInitDialog()
    {
    .
    .
    //initializes the Component Object Model(COM)
    CoInitialize(0);
    //We call below function since we only need to create one object
    CoCreateInstance(CLSID_TaskbarList,0, 
      CLSCTX_INPROC_SERVER,IID_ITaskbarList,(void**)&pTaskbar);
    //Below function will initialize the taskbar list object
    pTaskbar->HrInit(this);
    .
    .
    .
    }
  4. Implementation

    This is the function that you can use to hide the "box" in taskbar.

    void CMyDlg::DeleteTaskbar()
    {
    //Hide it
    pTaskbar->DeleteTab(this);
    }

Try the other methods for pTaskbar, and you will experience some stuff.

Forgive me if this article doesn't explain much. My purpose is just to provide another alternative. Since this "way" hasn't been posted yet.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

About the Author

Aris Adrianto S
Business Analyst HSBC, Citi
Indonesia Indonesia
Multi Platform System Analyst, Application Developer, Database Designer, and Project Manager in a wide variety of Business Applications and Industrial Automations.
 
Experienced for in-depth data analysis, data warehousing, reporting, and actively involve in supporting the business growth.

Comments and Discussions

 
QuestionHrInit() interface declaration Pinmemberjph.torcy21-Jun-11 3:12 
GeneralMy vote of 1 PinmemberElchay2-Feb-09 11:55 
QuestionTaskbar button comes back PinmemberPietju20-Sep-08 5:33 
QuestionAny idea how to change the text of a taskbar item PinmemberPit M.23-Dec-05 1:57 
GeneralThis method might be simpler. Pinsussanonymous15-Sep-05 18:18 
GeneralRe: This method might be simpler. Pinmemberaquawicket12-Jul-07 16:54 
Questionhow do i hide a program/window/taskbar/icon PinsussAnonymous28-Mar-05 5:57 
AnswerRe: how do i hide a program/window/taskbar/icon PinmemberDingos Pingo6-Mar-06 18:44 
Questionsample code ? Pinmemberriki_risnandar23-Nov-04 22:07 
GeneralWhere place "pTaskbar->DeleteTab(...)" Pinmemberpagaia15-Sep-04 5:01 
GeneralSuggestion. PinmemberWREY17-Apr-04 9:30 
GeneralRe: Suggestion. PinmemberAris A S17-Apr-04 10:38 
General"annoying box in the taskbar" Pinmemberdog_spawn17-Apr-04 11:09 
GeneralRe: "annoying box in the taskbar" PinmemberAris A S17-Apr-04 11:42 
GeneralRe: "annoying box in the taskbar" PinmemberBalder1978-218-Nov-04 6:02 

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