diff --git a/include/dxgi.idl b/include/dxgi.idl
index abfd299..8cba615 100644
--- a/include/dxgi.idl
+++ b/include/dxgi.idl
@@ -20,6 +20,10 @@
 
 cpp_quote("#if 0")
 typedef HANDLE HMONITOR;
+typedef struct _LUID {
+    DWORD LowPart;
+    LONG HighPart;
+} LUID, *PLUID;
 cpp_quote("#endif")
 
 typedef UINT DXGI_USAGE;
@@ -62,6 +66,18 @@
     LARGE_INTEGER SyncGPUTime;
 } DXGI_FRAME_STATISTICS;
 
+typedef struct DXGI_ADAPTER_DESC {
+    WCHAR Description[128];
+    UINT VendorId;
+    UINT DeviceId;
+    UINT SubSysId;
+    UINT Revision;
+    SIZE_T DedicatedVideoMemory;
+    SIZE_T DedicatedSystemMemory;
+    SIZE_T SharedSystemMemory;
+    LUID AdapterLuid;
+} DXGI_ADAPTER_DESC;
+
 typedef struct DXGI_SWAP_CHAIN_DESC {
     DXGI_MODE_DESC BufferDesc;
     DXGI_SAMPLE_DESC SampleDesc;
@@ -183,6 +199,26 @@
 [
     object,
     local,
+    uuid(2411e7e1-12ac-4ccf-bd14-9798e8534dc0)
+]
+interface IDXGIAdapter : IDXGIObject
+{
+    HRESULT EnumOutputs(
+        [in] UINT output_idx,
+        [in, out] IDXGIOutput **output
+    );
+    HRESULT GetDesc(
+        [out] DXGI_ADAPTER_DESC *desc
+    );
+    HRESULT CheckInterfaceSupport(
+        [in] REFGUID guid,
+        [out] LARGE_INTEGER umd_version
+    );
+}
+
+[
+    object,
+    local,
     uuid(310d36a0-d2e7-4c0a-aa04-6a9d23b8886a)
 ]
 interface IDXGISwapChain : IDXGIDeviceSubObject