[jawsscripts] Re: Searching menu structures for a particular menu item

Hey Jamal,
A quick question for you: is there a way to retrieve text string 
associated with a menu ID without actually activating the menu item 
itself? I am not able to figure that one out and not sure if the method 
even exists..
Thx,
Vic

Jamal Mazrui wrote:
> I found a message I previously wrote explaining the SendMessage (or
> PostMessage) technique for invoking a menu item.  Once again, WinDig is
> available at
> http://EmpowermentZone.com/wdsetup.exe
> 
> You can get almost any of my programs from the Open Source Projects page
> of
> http://NonvisualDevelopment.org
> 
> Jamal
> 
> From: Jawsscripts-bounces@xxxxxxxxxxxxxxxxxxxx on behalf of Jamal Mazrui
> [empower@xxxxxxxxx]
> Sent: Friday, September 23, 2005 6:36 AM
> To: jawsscripts@xxxxxxxxxxxxxxxxxxxx
> Subject: Using WinDig output to invoke menu choices via SendMessage
> 
> In the "Menus" section of WinDig output, the last piece of data on the
> line for a menu item is its menu ID--if one exists.  If a menu item does
> not have a hot key but does have a menu ID, you can create a hot key via a
> JAWS script and the SendMessage function.  For example, the following line
> of WinDig output is about the Paste Special menu item of WordPad:
> 
> 2.5   Paste Special...        S       57639
> 
> The 2.5 number is the outline number of the menu hierarchy, indicating
> that the menu item is the fifth one down the second menu, the Edit menu.
> The ... ellipses indicate that the menu item presents a dialog.  S is the
> access letter, indicating that you can press it when the Edit menu is
> dropped down to invoke this menu item.  Finally, the 57639 number is the
> menu ID, similar to a control ID.
> 
> This review of the WinDig output for WordPad showed no accelerator key for
> PasteSpecial but a menu ID was available.  I am not suggesting that
> scripts are needed for every menu item without a hot key--this is just to
> illustrate the technique, and you would judge whether such a script adds
> significant value in the context of the application.
> 
> Although it is also possible to invoke a menu item by sending keystrokes
> to the application, that technique is less reliable because it is affected
> by the current keyboard focus.  It also tends to produce extra speech
> which you may then need to silence with SpeechOff and Delay functions.
> 
> The SendMessage approach, on the other hand, does not actually activate
> and navigate the menus of the application's user interface.  It uses a
> Windows message constant, WM_COMMAND, which is passed with a menu ID to
> the application window associated with the menu of interest.  The relevant
> window handle is usually the one returned by GetAppMainWindow, but the
> InvokeMenuItem wrapper function below does not assume this in case you
> wish to use another window, including a window of an application other
> than the one with focus.
> 
>   The code below consists of a generic function called InvokeMenuItem, and
> a sample script called PasteSpecial, which might be attached to
> Control+Shift+V. Note that a limitation of this approach is that it only
> works if the application implements standard menus of the Win32 API.
> Unfortunately, many applications do not, such as those in the Microsoft
> Office suite.
> 
> Jamal
> 
> 
> Int Function InvokeMenuItem(Handle h, Int i)
> Var
> Int WM_COMMAND
> 
> Let WM_COMMAND = 273
> Return SendMessage(h, WM_COMMAND, i, 0)
> EndFunction
> 
> Script PasteSpecial()
> Var
> Handle h,
> Int i
> 
> Let h = GetAppMainWindow(GetFocus())
> Let i = 57639 ; menu ID of Paste Special in WordPad
> 
> InvokeMenuItem(h, i)
> EndScript
> 
> 
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