DWORD pid;
CComPtr<IApplicationActivationManager> paam;
CoCreateInstance(CLSID_ApplicationActivationManager, NULL, CLSCTX_LOCAL_SERVER, IID_PPV_ARGS(&paam));
CoAllowSetForegroundWindow(paam, NULL);
paam->ActivateForFile(pwszAppUserModelId, psia, L"open", &pid);