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Disabling Menu Items in IE using Browser Helper Objects

Posted on 2002-05-25
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Last Modified: 2008-02-26
Hi! I have developed a browser helper objects to block certain keyboard actions and the mouse actions on the browser. I want to disable some of the menu options like print, save, and stuff like that. I have implemented the IDocHostUIHandler Interface and has implemented hte ShowUI method as well. How do I proceed now....
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Question by:salur
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BeyondWu earned 500 total points
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I think you can subclass the IE mainframe. Then you can catch WM_INITMENU or WM_INITMENUPOPUP, the these handler you can disable/enable the menu item.
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by:salur
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Thanks for your comment. Are you sure its going to work.
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by:BeyondWu
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I'm not very sure:o( but you can try it:o)
Maybe you have implement the IObjectWithSite interface,
then you can get the hwnd handle of the ie in the setsite function.
IObjectWithSite::SetSite(IUnknown* punkSite)
{
    if(punkSite)
    {
      //Get the parent window.
      IOleWindow  *pOleWindow;
      m_hwndParent = NULL;  // this is hwnd of ie.
      if(SUCCEEDED(punkSite->QueryInterface(IID_IOleWindow, (LPVOID*)&pOleWindow)))
      {
         pOleWindow->GetWindow(&m_hwndParent);
         pOleWindow->Release();
      }
      // ...subclass it...
      g_oldWndProc = (WNDPROC)SetWindowLong(m_hwndParent, GWL_WNDPROC, (LPARAM)(WNDPROC)NewExplorerProc);
      // ...
}

You can try it.
Good Luck.
         
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by:salur
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Hi! Thanks a lot for your comments. I shall try it out and get back to you in this regard.
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Expert Comment

by:GregToombs
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I tried experimenting myself, and found only one way to intercept the messages of the Internet Explorer window. If you provide me with your email address I will send you the source code I've written to disable or enable any menu in Internet Explorer.
My email address is gregtoombs@yahoo.com
Thanks, it's been an interesting learning experience.

-Greg
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by:salur
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Hi!,,

Beyondwu-----------I appreciate your efforts, thanks for the code snippet....I shall try it out...

GregToombs----I am eagerly waiting to see the source.....

THanks & Regards,
Sandy
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Expert Comment

by:GregToombs
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The method I used is a little bit complex, so I don't know if it'll suit your needs or not.
I first tried subclassing the IE window, as BeyondWu suggested, but then I found out that Windows doesn't support subclassing windows that aren't owned by the caller process.
I found out how to get the messages: using hooks. One has to write a .DLL containing a function similar in nature to WindowProc. Every time the external window receives a message, it goes through the hook in your DLL first.
Then, you need to write another program, a .EXE, that loads your DLL and associates its hook with IE.

What I think I'll do is, to make matters simpler for you, I'll write the DLL. It'll have a generic initialization function that asks for the target HWND and a callback function pointer to a standard WindowProc that -you- provide.

How about, for exports for the hook dll,

BOOL HookInitialize(HWND targWindow, WNDPROC messageCallback);

That's it.
When you unload the DLL the hook'll be destroyed as well.
Sound okay?
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Expert Comment

by:DanRollins
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hi salur, are you still looking for a solution to this problem? -- Dan
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by:griessh
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Dear salur

I think you forgot this question. I will ask Community Support to close it unless you finalize it within 7 days. You can always request to keep this question open. But remember, experts can only help you if you provide feedback to their questions.
Unless there is objection or further activity,  I will suggest to accept

     "BeyondWu"

comment(s) as an answer.
     "refund the points and delete this question"
since nobody had a satisfying answer for you.
since you never gave more feedback.
PAQ at zero points.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
======
Werner
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by:Mindphaser
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Force accepted

** Mindphaser - Community Support Moderator **
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