实用!超强VC/MFC 常见问答收集

            var.vt = VT_BSTR;
            hr = pBag->Read(L"FriendlyName", &var, NULL);
            if(hr == NOERROR)
            {
                AppendMenu(hMenuSub, MF_STRING, MENU_VDEVICE0 + uIndex,
                    W2T(var.bstrVal));

                if(gcap.pmVideo != 0 && (S_OK == gcap.pmVideo->IsEqual(pM)))
                    bCheck = TRUE;

                CheckMenuItem(hMenuSub,  MENU_VDEVICE0 + uIndex,
                    (bCheck ? MF_CHECKED : MF_UNCHECKED));
                EnableMenuItem(hMenuSub, MENU_VDEVICE0 + uIndex,
                    (gcap.fCapturing ? MF_DISABLED : MF_ENABLED));
                bCheck = FALSE;

                SysFreeString(var.bstrVal);

                ASSERT(gcap.rgpmVideoMenu[uIndex] == 0);
                gcap.rgpmVideoMenu[uIndex] = pM;
                pM->AddRef();
            }
            pBag->Release();
        }

        pM->Release();
        uIndex++;
    }
    pEm->Release();

bool FileExists(CString FileName)
{
WIN32_FIND_DATA FindFileData;