diff --git a/Makefile b/Makefile
index 622a878..5411712 100644
--- a/Makefile
+++ b/Makefile
@@ -13,6 +13,7 @@ FILES = src/IDirect3D/IDirect3D.c \
         src/IDirectDraw/IDirectDrawPalette.c \
         src/IDirectDraw/IDirectDrawClipper.c \
         src/IDirectDraw/IDirectDrawSurface.c \
+        src/IAMMediaStream/IAMMediaStream.c \
         src/dd.c \
         src/ddpalette.c \
         src/ddsurface.c \
diff --git a/cnc-ddraw.vcxproj b/cnc-ddraw.vcxproj
index 88502e4..71c51a1 100644
--- a/cnc-ddraw.vcxproj
+++ b/cnc-ddraw.vcxproj
@@ -36,6 +36,7 @@
     <ClCompile Include="src\IDirect3D\IDirect3D2.c" />
     <ClCompile Include="src\IDirect3D\IDirect3D3.c" />
     <ClCompile Include="src\IDirect3D\IDirect3D7.c" />
+    <ClCompile Include="src\IAMMediaStream\IAMMediaStream.c" />
     <ClCompile Include="src\utils.c" />
     <ClCompile Include="src\hook.c" />
     <ClCompile Include="src\IDirectDraw\IDirectDraw.c" />
@@ -63,6 +64,7 @@
     <ClInclude Include="inc\dllmain.h" />
     <ClInclude Include="inc\glcorearb.h" />
     <ClInclude Include="inc\IDirect3D.h" />
+    <ClInclude Include="inc\IAMMediaStream.h" />
     <ClInclude Include="inc\utils.h" />
     <ClInclude Include="inc\hook.h" />
     <ClInclude Include="inc\IDirectDraw.h" />
diff --git a/cnc-ddraw.vcxproj.filters b/cnc-ddraw.vcxproj.filters
index 6dacdad..151ad93 100644
--- a/cnc-ddraw.vcxproj.filters
+++ b/cnc-ddraw.vcxproj.filters
@@ -22,6 +22,9 @@
     <Filter Include="Source Files\IDirect3D">
       <UniqueIdentifier>{e6c62066-0a71-4531-ad9a-eb428abc6f44}</UniqueIdentifier>
     </Filter>
+    <Filter Include="Source Files\IAMMediaStream">
+      <UniqueIdentifier>{b6d5d0fc-844e-4068-8a1e-1b0386f359fc}</UniqueIdentifier>
+    </Filter>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="src\debug.c">
@@ -138,6 +141,9 @@
     <ClCompile Include="src\IDirect3D\IDirect3D7.c">
       <Filter>Source Files\IDirect3D</Filter>
     </ClCompile>
+    <ClCompile Include="src\IAMMediaStream\IAMMediaStream.c">
+      <Filter>Source Files\IAMMediaStream</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="inc\ddraw.h">
@@ -230,6 +236,9 @@
     <ClInclude Include="inc\IDirect3D.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="inc\IAMMediaStream.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="ddraw.rc">
diff --git a/inc/IAMMediaStream.h b/inc/IAMMediaStream.h
new file mode 100644
index 0000000..28ab588
--- /dev/null
+++ b/inc/IAMMediaStream.h
@@ -0,0 +1,46 @@
+#ifndef IAMMEDIASTREAM_H 
+#define IAMMEDIASTREAM_H
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+
+DEFINE_GUID(IID_IMediaStream, 0xb502d1bd, 0x9a57, 0x11d0, 0x8f, 0xde, 0x00, 0xc0, 0x4f, 0xd9, 0x18, 0x9d);
+DEFINE_GUID(IID_IAMMediaStream, 0xbebe595d, 0x9a6f, 0x11d0, 0x8f, 0xde, 0x00, 0xc0, 0x4f, 0xd9, 0x18, 0x9d);
+
+extern struct IAMMediaStreamImplVtbl g_ms_vtbl;
+
+struct IAMMediaStreamImpl;
+struct IAMMediaStreamImplVtbl;
+
+typedef struct IAMMediaStreamImpl
+{
+    struct IAMMediaStreamImplVtbl* lpVtbl;
+
+    ULONG ref;
+
+} IAMMediaStreamImpl;
+
+typedef struct IAMMediaStreamImplVtbl IAMMediaStreamImplVtbl;
+
+struct IAMMediaStreamImplVtbl
+{
+    HRESULT(__stdcall* QueryInterface) (IAMMediaStreamImpl*, const IID* const riid, LPVOID* ppvObj);
+    ULONG(__stdcall* AddRef) (IAMMediaStreamImpl*);
+    ULONG(__stdcall* Release) (IAMMediaStreamImpl*);
+    // IMediaStream
+    HRESULT(__stdcall* GetMultiMediaStream)(IAMMediaStreamImpl* This, int a);
+    HRESULT(__stdcall* GetInformation)(IAMMediaStreamImpl* This, int a, int b);
+    HRESULT(__stdcall* SetSameFormat)(IAMMediaStreamImpl* This, int a, int b);
+    HRESULT(__stdcall* AllocateSample)(IAMMediaStreamImpl* This, int a, int b);
+    HRESULT(__stdcall* CreateSharedSample)(IAMMediaStreamImpl* This, int a, int b, int c);
+    HRESULT(__stdcall* SendEndOfStream)(IAMMediaStreamImpl* This, int a);
+    // IAMMediaStream
+    HRESULT(__stdcall* Initialize)(IAMMediaStreamImpl* This, int a, int b, int c, int d);
+    HRESULT(__stdcall* SetState)(IAMMediaStreamImpl* This, int a);
+    HRESULT(__stdcall* JoinAMMultiMediaStream)(IAMMediaStreamImpl* This, int a);
+    HRESULT(__stdcall* JoinFilter)(IAMMediaStreamImpl* This, int a);
+    HRESULT(__stdcall* JoinFilterGraph)(IAMMediaStreamImpl* This, int a);
+};
+
+#endif
diff --git a/src/IAMMediaStream/IAMMediaStream.c b/src/IAMMediaStream/IAMMediaStream.c
new file mode 100644
index 0000000..d16d225
--- /dev/null
+++ b/src/IAMMediaStream/IAMMediaStream.c
@@ -0,0 +1,145 @@
+#include "IAMMediaStream.h"
+#include "debug.h"
+
+HRESULT __stdcall IAMMediaStream__QueryInterface(IAMMediaStreamImpl* This, REFIID riid, void** obj)
+{
+    dprintf("NOT_IMPLEMENTED -> %s(This=%p, riid=%08X, obj=%p)\n", __FUNCTION__, This, (unsigned int)riid, obj);
+    HRESULT ret = E_FAIL;
+    dprintf("NOT_IMPLEMENTED <- %s\n", __FUNCTION__);
+    return ret;
+}
+
+ULONG __stdcall IAMMediaStream__AddRef(IAMMediaStreamImpl* This)
+{
+    dprintf("-> %s(This=%p)\n", __FUNCTION__, This);
+    ULONG ret = ++This->ref;
+    dprintf("<- %s(This ref=%u)\n", __FUNCTION__, ret);
+    return ret;
+}
+
+ULONG __stdcall IAMMediaStream__Release(IAMMediaStreamImpl* This)
+{
+    dprintf("-> %s(This=%p)\n", __FUNCTION__, This);
+
+    ULONG ret = --This->ref;
+
+    if (This->ref == 0)
+    {
+        dprintf("     Released (%p)\n", This);
+
+        HeapFree(GetProcessHeap(), 0, This);
+    }
+
+    dprintf("<- %s(This ref=%u)\n", __FUNCTION__, ret);
+    return ret;
+}
+
+HRESULT WINAPI IAMMediaStream__GetMultiMediaStream(IAMMediaStreamImpl* This, int a)
+{
+    dprintf("NOT_IMPLEMENTED -> %s(This=%p)\n", __FUNCTION__, This);
+    HRESULT ret = E_FAIL;
+    dprintf("NOT_IMPLEMENTED <- %s\n", __FUNCTION__);
+    return ret;
+}
+
+HRESULT WINAPI IAMMediaStream__GetInformation(IAMMediaStreamImpl* This, int a, int b)
+{
+    dprintf("NOT_IMPLEMENTED -> %s(This=%p)\n", __FUNCTION__, This);
+    HRESULT ret = E_FAIL;
+    dprintf("NOT_IMPLEMENTED <- %s\n", __FUNCTION__);
+    return ret;
+}
+
+HRESULT WINAPI IAMMediaStream__SetSameFormat(IAMMediaStreamImpl* This, int a, int b)
+{
+    dprintf("NOT_IMPLEMENTED -> %s(This=%p)\n", __FUNCTION__, This);
+    HRESULT ret = E_FAIL;
+    dprintf("NOT_IMPLEMENTED <- %s\n", __FUNCTION__);
+    return ret;
+}
+
+HRESULT WINAPI IAMMediaStream__AllocateSample(IAMMediaStreamImpl* This, int a, int b)
+{
+    dprintf("NOT_IMPLEMENTED -> %s(This=%p)\n", __FUNCTION__, This);
+    HRESULT ret = E_FAIL;
+    dprintf("NOT_IMPLEMENTED <- %s\n", __FUNCTION__);
+    return ret;
+}
+
+HRESULT WINAPI IAMMediaStream__CreateSharedSample(IAMMediaStreamImpl* This, int a, int b, int c)
+{
+    dprintf("NOT_IMPLEMENTED -> %s(This=%p)\n", __FUNCTION__, This);
+    HRESULT ret = E_FAIL;
+    dprintf("NOT_IMPLEMENTED <- %s\n", __FUNCTION__);
+    return ret;
+}
+
+HRESULT WINAPI IAMMediaStream__SendEndOfStream(IAMMediaStreamImpl* This, int a)
+{
+    dprintf("NOT_IMPLEMENTED -> %s(This=%p)\n", __FUNCTION__, This);
+    HRESULT ret = E_FAIL;
+    dprintf("NOT_IMPLEMENTED <- %s\n", __FUNCTION__);
+    return ret;
+}
+
+// IAMMediaStream
+HRESULT WINAPI IAMMediaStream__Initialize(IAMMediaStreamImpl* This, int a, int b, int c, int d)
+{
+    dprintf("NOT_IMPLEMENTED -> %s(This=%p)\n", __FUNCTION__, This);
+    HRESULT ret = E_FAIL;
+    dprintf("NOT_IMPLEMENTED <- %s\n", __FUNCTION__);
+    return ret;
+}
+
+HRESULT WINAPI IAMMediaStream__SetState(IAMMediaStreamImpl* This, int a)
+{
+    dprintf("NOT_IMPLEMENTED -> %s(This=%p)\n", __FUNCTION__, This);
+    HRESULT ret = E_FAIL;
+    dprintf("NOT_IMPLEMENTED <- %s\n", __FUNCTION__);
+    return ret;
+}
+
+HRESULT WINAPI IAMMediaStream__JoinAMMultiMediaStream(IAMMediaStreamImpl* This, int a)
+{
+    dprintf("NOT_IMPLEMENTED -> %s(This=%p)\n", __FUNCTION__, This);
+    HRESULT ret = E_FAIL;
+    dprintf("NOT_IMPLEMENTED <- %s\n", __FUNCTION__);
+    return ret;
+}
+
+HRESULT WINAPI IAMMediaStream__JoinFilter(IAMMediaStreamImpl* This, int a)
+{
+    dprintf("NOT_IMPLEMENTED -> %s(This=%p)\n", __FUNCTION__, This);
+    HRESULT ret = E_FAIL;
+    dprintf("NOT_IMPLEMENTED <- %s\n", __FUNCTION__);
+    return ret;
+}
+
+HRESULT WINAPI IAMMediaStream__JoinFilterGraph(IAMMediaStreamImpl* This, int a)
+{
+    dprintf("NOT_IMPLEMENTED -> %s(This=%p)\n", __FUNCTION__, This);
+    HRESULT ret = E_FAIL;
+    dprintf("NOT_IMPLEMENTED <- %s\n", __FUNCTION__);
+    return ret;
+}
+ 
+struct IAMMediaStreamImplVtbl g_ms_vtbl =
+{
+    /* IUnknown */
+    IAMMediaStream__QueryInterface,
+    IAMMediaStream__AddRef,
+    IAMMediaStream__Release,
+    /* IMediaStream */
+    IAMMediaStream__GetMultiMediaStream,
+    IAMMediaStream__GetInformation,
+    IAMMediaStream__SetSameFormat,
+    IAMMediaStream__AllocateSample,
+    IAMMediaStream__CreateSharedSample,
+    IAMMediaStream__SendEndOfStream,
+    /* IAMMediaStream */
+    IAMMediaStream__Initialize,
+    IAMMediaStream__SetState,
+    IAMMediaStream__JoinAMMultiMediaStream,
+    IAMMediaStream__JoinFilter,
+    IAMMediaStream__JoinFilterGraph,
+};
diff --git a/src/IDirectDraw/IDirectDraw.c b/src/IDirectDraw/IDirectDraw.c
index 32753d4..c161082 100644
--- a/src/IDirectDraw/IDirectDraw.c
+++ b/src/IDirectDraw/IDirectDraw.c
@@ -1,6 +1,7 @@
 #include <initguid.h>
 #include "IDirectDraw.h"
 #include "IDirect3D.h"
+#include "IAMMediaStream.h"
 #include "dd.h"
 #include "ddclipper.h"
 #include "ddpalette.h"
@@ -95,12 +96,25 @@ HRESULT __stdcall IDirectDraw__QueryInterface(IDirectDrawImpl* This, REFIID riid
 
             ret = S_OK;
         }
-        else
+        else if (IsEqualGUID(&IID_IMediaStream, riid) || IsEqualGUID(&IID_IAMMediaStream, riid))
         {
-            dprintf("     GUID = %08X\n", ((GUID*)riid)->Data1);
+            IAMMediaStreamImpl* ms = (IAMMediaStreamImpl*)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IAMMediaStreamImpl));
+
+            dprintf("     GUID = %08X (IID_IXXMediaStream)\n", ((GUID*)riid)->Data1);
+
+            ms->lpVtbl = &g_ms_vtbl;
+            ms->lpVtbl->AddRef(ms);
+
+            *obj = ms;
 
             ret = S_OK;
         }
+        else
+        {
+            dprintf("NOT_IMPLEMENTED     GUID = %08X\n", ((GUID*)riid)->Data1);
+
+            ret = E_FAIL;
+        }
     }
 
     dprintf("<- %s\n", __FUNCTION__);