Thread: How is a window like the MS OFFICE Suite Tools Bar created?

Hi There,

How is a window like the MS OFFICE Suite Tools Bar created at the right side of the windows desktop? For this kind of window, all other windows always are laid out side by side with it even if other windows are maximized. It keeps not overlapped by them.
This kind of windows not just defines its own behaviours, but also changes other windows' too. It likes very much the windows TASK BAR.

Thanks,

MSDN: Using Application Desktop Toolbars

Yes, It is. Thanks a lot.
When I read the article, I find it is a little difficult to follow. I copy the example in it below.
1. How is APPBAR_CALLBACK defined?
// Provide an identifier for notification messages.
abd.uCallbackMessage = APPBAR_CALLBACK;
Can somebody show an example?
Or is another fragment AppBarCallback in the article the one? But when I compile it, I got the following error:

error C2440: '=' : cannot convert from 'void (__cdecl *)(struct HWND__ *,unsigned int,long)' to 'unsigned int'

2. Is hwndAccessBar IN parameter or OUT?
3. Where are the following variables defined?
UINT g_uSide ?
BOOL g_fAppRegistered?

Code:

// RegisterAccessBar - registers or unregisters an appbar. 
// Returns TRUE if successful, or FALSE otherwise. 
// hwndAccessBar - handle to the appbar 
// fRegister - register and unregister flag 
// 
// Global variables 
//     g_uSide - screen edge (defaults to ABE_TOP) 
//     g_fAppRegistered - flag indicating whether the bar is registered 

BOOL RegisterAccessBar(HWND hwndAccessBar, BOOL fRegister) 
{ 
    APPBARDATA abd; 

    // Specify the structure size and handle to the appbar. 
    abd.cbSize = sizeof(APPBARDATA); 
    abd.hWnd = hwndAccessBar; 

    if (fRegister) { 

        // Provide an identifier for notification messages. 
        abd.uCallbackMessage = APPBAR_CALLBACK; 

        // Register the appbar. 
        if (!SHAppBarMessage(ABM_NEW, &abd)) 
            return FALSE; 

        g_uSide = ABE_TOP;       // default edge 
        g_fAppRegistered = TRUE; 

    } else { 

        // Unregister the appbar. 
        SHAppBarMessage(ABM_REMOVE, &abd); 
        g_fAppRegistered = FALSE; 
    } 

    return TRUE; 

}

Thanks,