Determine amount of video ram in a GFX card?

[Clootie]

1) DirectX - use Direct3D7 interfaces for this
2) more general - use WMI. -- C++ version
3) another DirectX - use DXDiag...
again C++ version :roll:

   IDxDiagProviderAutoPtr dxDiagProvider;
   HRESULT hr = CoCreateInstance(CLSID_DxDiagProvider, 0,
CLSCTX_INPROC_SERVER, IID_IDxDiagProvider, (LPVOID*)&dxDiagProvider);
   if (SUCCEEDED(hr))
   {
      DXDIAG_INIT_PARAMS dxDiagInitParam;
      ZeroMemory(&dxDiagInitParam, sizeof(DXDIAG_INIT_PARAMS));

      dxDiagInitParam.dwSize                =
sizeof(DXDIAG_INIT_PARAMS);
      dxDiagInitParam.dwDxDiagHeaderVersion = DXDIAG_DX9_SDK_VERSION;
      dxDiagInitParam.bAllowWHQLChecks      = FALSE;
      dxDiagInitParam.pReserved             = 0;

      IDxDiagContainerAutoPtr dxDiagRoot;
      hr = dxDiagProvider->Initialize(&dxDiagInitParam);
      if (SUCCEEDED(hr))
      {
         hr = dxDiagProvider->GetRootContainer(&dxDiagRoot);
         if (SUCCEEDED(hr))
         {
            // enumerate all display devices until we find the device
identified by mD3DAdapterIdentifier.DeviceIdentifier
            IDxDiagContainerAutoPtr dxDispDevices;
            hr = dxDiagRoot->GetChildContainer(L"DxDiag_DisplayDevices",
&dxDispDevices);
            if (SUCCEEDED(hr))
            {
               DWORD numDevices = 0;
               hr =
dxDispDevices->GetNumberOfChildContainers(&numDevices);
               if (SUCCEEDED(hr))
               {
                  for &#40;Uint dev = 0; dev < numDevices; dev++&#41;
                  &#123;
                     WCHAR devName&#91;256&#93;;
                     hr = dxDispDevices->EnumChildContainerNames&#40;dev,
devName, 256&#41;;
                     if &#40;SUCCEEDED&#40;hr&#41;&#41;
                     &#123;
                        IDxDiagContainerAutoPtr dxDispDevice;
                        hr = dxDispDevices->GetChildContainer&#40;devName,
&dxDispDevice&#41;;
                        if &#40;SUCCEEDED&#40;hr&#41;&#41;
                        &#123;
                           // get this device's GUID, and see if it is
equal to mD3DAdapterIdentifier.DeviceIdentifier
                           GUID devGUID;
                           memcpy&#40;&devGUID, &__uuidof&#40;0&#41;, sizeof&#40;GUID&#41;&#41;;

                           VARIANT v;
                           VariantInit&#40;&v&#41;;
                           hr =
dxDispDevice->GetProp&#40;L"szDeviceIdentifier", &v&#41;;
                           if &#40;SUCCEEDED&#40;hr&#41; && v.vt == VT_BSTR&#41;
                           &#123;
                              IIDFromString&#40;v.bstrVal, &devGUID&#41;;
                           &#125;

                           VariantClear&#40;&v&#41;;

                           if &#40;IsEqualGUID&#40;devGUID,
mD3DAdapterIdentifier.DeviceIdentifier&#41;&#41;
                           &#123;
                              // parse the display adapter memory string
                              hr =
dxDispDevice->GetProp&#40;L"szDisplayMemoryEnglish", &v&#41;;
                              if &#40;SUCCEEDED&#40;hr&#41; && v.vt == VT_BSTR&#41;
                              &#123;
                                 WCHAR* endPtr = 0;
                                 double adapterRam = wcstod&#40;v.bstrVal,
&endPtr&#41;;
                                 if &#40;endPtr != v.bstrVal&#41;
                                 &#123;
                                    mVideoMemorySize = long&#40;adapterRam&#41;
* 1024 * 1024;
                                 &#125;
                              &#125;

                              VariantClear&#40;&v&#41;;

                              break;   // done enumerating devices
                           &#125;
                        &#125;
                     &#125;
                  &#125;
               &#125;
            &#125;
         &#125;
      &#125;
   &#125;