HRESULT CDeskBand::GetIServiceProvider(HWND hwnd, IServiceProvider ** pServiceProvider)
{
HRESULT hr = E_FAIL;
if (m_pSite)
hr = m_pSite->QueryInterface(IID_IServiceProvider, (LPVOID*)pServiceProvider);
else
{
// we don't have a site, so we try finding the explorer window by enumerating
// all explorer instances and compare that to the parent of hwnd.
IShellWindows *psw;
if (SUCCEEDED(CoCreateInstance(CLSID_ShellWindows, NULL, CLSCTX_ALL, IID_IShellWindows, (LPVOID*)&psw)))
{
VARIANT v;
V_VT(&v) = VT_I4;
IDispatch *pdisp;
BOOL fFound = FALSE;
long count = -1;
if (SUCCEEDED(psw->get_Count(&count)))
{
for (V_I4(&v) = 0; !fFound && (V_I4(&v) < count) && SUCCEEDED(psw->Item(v, &pdisp)); V_I4(&v)++)
{
if (pdisp)
{
IWebBrowserApp *pwba;
if (SUCCEEDED(pdisp->QueryInterface(IID_IWebBrowserApp, (LPVOID*)&pwba)))
{
HWND hwndWBA;
if (SUCCEEDED(pwba->get_HWND((LONG_PTR*)&hwndWBA)))
{
if ((hwndWBA == hwnd)||(hwndWBA == ::GetParent(hwnd)))
{
fFound = TRUE;
hr = pwba->QueryInterface(IID_IServiceProvider, (void**)pServiceProvider);
}
}
pwba->Release();
}
pdisp->Release();
}
}
}
psw->Release();
}
}
return hr;
}
