COM 对象函数上的 API 挂钩?

The relevant code follows. I'm using MinHook, a minimalistic hooking library that uses the tried-and-true method of trampoline functions.

typedef HRESULT (WINAPI *BROWSEOBJECT)(IShellBrowser*, PCUIDLIST_RELATIVE, UINT);
HRESULT WINAPI DetourBrowseObject(IShellBrowser* _this, PCUIDLIST_RELATIVE pidl, UINT wFlags);
BROWSEOBJECT fpBrowseObject = NULL;
BROWSEOBJECT ShellBrowser_BrowseObject = NULL;

bool Initialize() {
    if(MH_Initialize() != MH_OK) {
        return false;
    }

    // Get a reference to an existing IShellBrowser.  Any instance will do.
    // ShellBrowser enum code taken from The Old New Thing
    IShellWindows *psw;
    BOOL fFound = FALSE;
    if (SUCCEEDED(CoCreateInstance(CLSID_ShellWindows, NULL, CLSCTX_ALL, IID_IShellWindows, (void**)&psw))) {
        VARIANT v;
        V_VT(&v) = VT_I4;
        IDispatch  *pdisp;
        for (V_I4(&v) = 0; !fFound && psw->Item(v, &pdisp) == S_OK; V_I4(&v)++) {
            IWebBrowserApp *pwba;
            if (SUCCEEDED(pdisp->QueryInterface(IID_IWebBrowserApp, (void**)&pwba))) {
                IServiceProvider *psp;
                if (SUCCEEDED(pwba->QueryInterface(IID_IServiceProvider, (void**)&psp))) {
                    IShellBrowser *psb;
                    if (SUCCEEDED(psp->QueryService(SID_STopLevelBrowser,IID_IShellBrowser, (void**)&psb))) {
                        fFound = true;

                        // Grab the 11th entry in the VTable, which is BrowseObject
                        void** vtable = (*(void***)(psb));
                        ShellBrowser_BrowseObject = (BROWSEOBJECT)(vtable[11]);
                        psb->Release();
                    }
                    psp->Release();
                }
                pwba->Release();
            }
            pdisp->Release();
        }
        psw->Release();
    }

    if(fFound) {
        if(MH_CreateHook(ShellBrowser_BrowseObject, &DetourBrowseObject, reinterpret_cast<void**>(&fpBrowseObject)) != MH_OK) {
            return false;
        }
        if(MH_EnableHook(ShellBrowser_BrowseObject) != MH_OK) {
            return false;
        }
    }
    return true;
}

HRESULT WINAPI DetourBrowseObject(IShellBrowser* _this, PCUIDLIST_RELATIVE pidl, UINT wFlags) {
    if(NavigateIsOkay(pidl, wFlags)) {
        return fpBrowseObject(_this, pidl, wFlags);
    }
    else {
        return S_FALSE;
    }    
}

推荐答案

我从未听说过使用 API 挂钩挂钩 COM 对象函数.