WH_CALLWNDPROC crash

I am fedup with this problem. please help me..
i have to monitor an external windows messages, especially one USER
+22 message, this message is been sent on mouse click and right
click
pop menu .i can check mouse left click without any problem, I am
using WH_CALLWNDPROC hook .

The application crashes when a user right clicks and selects a pop-up
menu item

this problem seems to occur only new version of this
application(wich application i need monitor),old version dosn't have
this problem.

using DLL for CALLWNDPROC
 i use this way

#pragma comment(linker,"-section:MYSEG,ewrs")
 #pragma data_seg( "MYSEG" )
 HHOOK g_hHook = 0;
HWND g_MainWnd = NULL;
 #pragma data_seg()

set hook
            extern "C" BOOL _declspec(dllexport) SetHook(HWND hwnd )
            {
            if(g_MainWnd !=NULL)return 1;

            g_MainWnd = hwnd;
            HWND hWnd = ::FindWindow("AppwndClass", NULL); // Call DWORD
pId=0;

            DWORD pId2 = GetWindowThreadProcessId(GhWnd,&pId);

            HINSTANCE hModHnd=NULL;
            MEMORY_BASIC_INFORMATION mbi;
            static int dummy;
            VirtualQuery( &dummy, &mbi, sizeof(mbi) );
            DWORD hMod = (DWORD)mbi.AllocationBase;
            char szModule[MAX_PATH];
            GetModuleFileName( (HMODULE)hMod, szModule, sizeof(szModule) );

            hModHnd = GetModuleHandle(szModule);

            g_hHook =::SetWindowsHookEx( WH_CALLWNDPROC ,(HOOKPROC)HookProc,
(HINSTANCE)hInt,pId2);
            return 1;
            }

Hook procedure

        extern "C" LRESULT _declspec(dllexport) HookProc(int nCode,
WPARAM wParam, LPARAM lParam )
        {
    try
    {
        if(nCode<0)
        {

             return CallNextHookEx(g_hHook, nCode, wParam, lParam);

        }
         CWPSTRUCT *myStuct= (CWPSTRUCT*)lParam;

        if(myStuct!=NULL)
        {

            if(myStuct->message == WM_USER + 22)//1046
            {

            ::PostMessage(g_MainWnd, WM_USER + 22, myStuct->lParam, myStuct-
            
}
        if(myStuct->message == WM_USER + 21)//close app message
            {

                            ::UnhookWindowsHookEx(g_hHook);

                            ::PostMessage(g_MainWnd,WM_CLOSE,0,0);

                }

        }
    return CallNextHookEx(g_hHook, nCode, wParam, lParam);
    }//try

    catch(...)
    {

    }

kindly correct me if i am doing anything wrong ..