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01.12.2006 at 05:25AM PST, ID: 21693836
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7.4

Help on using system message filter hook WH_SYSMSGFILTER

Asked by ekartha in Microsoft Visual C++.Net

Tags: ,

I have a hook for system message hook filter where i get all the menu and dlg events.

LRESULT CALLBACK SysMsgProc( int nCode, WPARAM wParam, LPARAM lParam)
{
    if(nCode == MSGF_MENU)
    {
       LPMSG lpMsg = (LPMSG)lParam;
       char szTitle[1024] = {'\0'};
       ::GetWindowText(lpMsg->hwnd,szTitle,1024);
       if(strcmp(szTitle, "Untitled - Notepad") == 0)
       {
                   ?? We will reach here when untitled note pad menu is accessed..                
                   ? ?we have lpMsg  but How do I know which item user has clicked in which parameter of lpMsg will it come?
        
       }
                 
    }
   call next hook....
}

I am getting all the events on Menu...
How do I know which item user has clicked????  
I know Every item will have an identifier...Ex: SaveAS in File menu...
But in which parameter it will come in the MSG structure????

I just tried by printing all the MSG parameters in to a file....
sprintf(str,"%d-%d-%d", lpMsg->message,LOWORD(lpMsg->lParam,lpMsg->wParam);
fwrite(str,strlen(str),1,fp);

But i am unable to Block SaveAs or any command on noteppad...
ONce I know the Identifier of SaveAs command i can block the functionality..

Help me on this asap
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[+][-]01.12.2006 at 05:53AM PST, ID: 15681174

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[+][-]01.12.2006 at 05:58AM PST, ID: 15681215

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[+][-]01.12.2006 at 10:40PM PST, ID: 15689377

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[+][-]01.13.2006 at 05:24AM PST, ID: 15691034

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[+][-]02.17.2006 at 03:23AM PST, ID: 15979455

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About this solution

Zone: Microsoft Visual C++.Net
Tags: wh_sysmsgfilter, hook
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Solution Provided By: DarthMod
Participating Experts: 2
Solution Grade: A
 
 
 
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