diff --git a/dlls/ddraw/d3d_private.h b/dlls/ddraw/d3d_private.h
index d4b103cca22..340c92515ac 100644
--- a/dlls/ddraw/d3d_private.h
+++ b/dlls/ddraw/d3d_private.h
@@ -194,6 +194,9 @@ struct IDirect3DVertexBufferImpl
     ICOM_VFIELD_MULTI(IDirect3DVertexBuffer);
     DWORD ref;
     IDirect3DImpl *d3d;
+    D3DVERTEXBUFFERDESC desc;
+    LPVOID *vertices;
+    DWORD vertex_buffer_size;
 };
 
 /* Various dump functions */
diff --git a/dlls/ddraw/d3ddevice/mesa.c b/dlls/ddraw/d3ddevice/mesa.c
index 23bf49c7497..0d5b95c334e 100644
--- a/dlls/ddraw/d3ddevice/mesa.c
+++ b/dlls/ddraw/d3ddevice/mesa.c
@@ -241,7 +241,7 @@ static void fill_opengl_caps_7(D3DDEVICEDESC7 *d)
     d->dvMaxVertexW = 100000000.0; /* No idea exactly what to put here... */
     d->deviceGUID = IID_IDirect3DTnLHalDevice;
     d->wMaxUserClipPlanes = 1;
-    d->wMaxVertexBlendMatrices = 1;
+    d->wMaxVertexBlendMatrices = 0;
     d->dwVertexProcessingCaps = D3DVTXPCAPS_TEXGEN | D3DVTXPCAPS_MATERIALSOURCE7 | D3DVTXPCAPS_VERTEXFOG | D3DVTXPCAPS_DIRECTIONALLIGHTS |
       D3DVTXPCAPS_POSITIONALLIGHTS | D3DVTXPCAPS_LOCALVIEWER;
     d->dwReserved1 = 0;
@@ -883,7 +883,24 @@ GL_IDirect3DDeviceImpl_1_CreateExecuteBuffer(LPDIRECT3DDEVICE iface,
     return ret_value;
 }
 
-static void dump_flexible_vertex(DWORD d3dvtVertexType)
+DWORD get_flexible_vertex_size(DWORD d3dvtVertexType)
+{
+    DWORD size = 0;
+    
+    if (d3dvtVertexType & D3DFVF_NORMAL) size += 3 * sizeof(D3DVALUE);
+    if (d3dvtVertexType & D3DFVF_DIFFUSE) size += sizeof(DWORD);
+    if (d3dvtVertexType & D3DFVF_SPECULAR) size += sizeof(DWORD);
+    switch (d3dvtVertexType & D3DFVF_POSITION_MASK) {
+        case D3DFVF_XYZ: size += 3 * sizeof(D3DVALUE); break;
+        case D3DFVF_XYZRHW: size += 4 * sizeof(D3DVALUE); break;
+	default: TRACE(" matrix weighting not handled yet...\n");
+    }
+    size += 2 * sizeof(D3DVALUE) * ((d3dvtVertexType & D3DFVF_TEXCOUNT_MASK) >> D3DFVF_TEXCOUNT_SHIFT);
+
+    return size;
+}
+
+void dump_flexible_vertex(DWORD d3dvtVertexType)
 {
     static const flag_info flags[] = {
         FE(D3DFVF_NORMAL),
diff --git a/dlls/ddraw/d3dvertexbuffer.c b/dlls/ddraw/d3dvertexbuffer.c
index 18ec3f706b2..c64b0d97aab 100644
--- a/dlls/ddraw/d3dvertexbuffer.c
+++ b/dlls/ddraw/d3dvertexbuffer.c
@@ -91,7 +91,16 @@ Main_IDirect3DVertexBufferImpl_7_1T_Lock(LPDIRECT3DVERTEXBUFFER7 iface,
                                          LPDWORD lpdwSize)
 {
     ICOM_THIS_FROM(IDirect3DVertexBufferImpl, IDirect3DVertexBuffer7, iface);
-    FIXME("(%p/%p)->(%08lx,%p,%p): stub!\n", This, iface, dwFlags, lplpData, lpdwSize);
+    TRACE("(%p/%p)->(%08lx,%p,%p)\n", This, iface, dwFlags, lplpData, lpdwSize);
+
+    if (TRACE_ON(ddraw)) {
+        TRACE(" lock flags : ");
+	DDRAW_dump_lockflag(dwFlags);
+    }
+    
+    if (lpdwSize != NULL) *lpdwSize = This->vertex_buffer_size;
+    *lplpData = This->vertices;
+    
     return DD_OK;
 }
 
@@ -279,22 +288,36 @@ ICOM_VTABLE(IDirect3DVertexBuffer) VTABLE_IDirect3DVertexBuffer =
 #undef XCAST
 #endif
 
-HRESULT d3dvertexbuffer_create(IDirect3DVertexBufferImpl **obj, IDirect3DImpl *d3d, LPD3DVERTEXBUFFERDESC lpD3DVertBufDesc)
+HRESULT d3dvertexbuffer_create(IDirect3DVertexBufferImpl **obj, IDirect3DImpl *d3d, LPD3DVERTEXBUFFERDESC lpD3DVertBufDesc, DWORD dwFlags)
 {
     IDirect3DVertexBufferImpl *object;
+    static const flag_info flags[] = {
+        FE(D3DVBCAPS_OPTIMIZED),
+	FE(D3DVBCAPS_SYSTEMMEMORY),
+	FE(D3DVBCAPS_WRITEONLY)
+    };
 
     object = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirect3DVertexBufferImpl));
     if (object == NULL) return DDERR_OUTOFMEMORY;
 
     object->ref = 1;
     object->d3d = d3d;
+    object->desc = *lpD3DVertBufDesc;
+    object->vertex_buffer_size = get_flexible_vertex_size(lpD3DVertBufDesc->dwFVF) * lpD3DVertBufDesc->dwNumVertices;
+    object->vertices = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, object->vertex_buffer_size);
     
     ICOM_INIT_INTERFACE(object, IDirect3DVertexBuffer,  VTABLE_IDirect3DVertexBuffer);
     ICOM_INIT_INTERFACE(object, IDirect3DVertexBuffer7, VTABLE_IDirect3DVertexBuffer7);
 
     *obj = object;
 
-    TRACE(" creating implementation at %p.\n", *obj);
+    if (TRACE_ON(ddraw)) {
+        TRACE(" creating implementation at %p with description : \n", *obj);
+	TRACE("  - "); DDRAW_dump_flags_(lpD3DVertBufDesc->dwCaps, flags, sizeof(flags)/sizeof(flags[0]), TRUE);
+	TRACE("  - "); dump_flexible_vertex(lpD3DVertBufDesc->dwFVF);
+	TRACE("  - %ld\n", lpD3DVertBufDesc->dwNumVertices);
+    }
+    
     
     return D3D_OK;
 }
diff --git a/dlls/ddraw/direct3d/mesa.c b/dlls/ddraw/direct3d/mesa.c
index 2e4ff3c1698..0ce10556447 100644
--- a/dlls/ddraw/direct3d/mesa.c
+++ b/dlls/ddraw/direct3d/mesa.c
@@ -320,6 +320,25 @@ GL_IDirect3DImpl_7_CreateDevice(LPDIRECT3D7 iface,
     return create_device_helper(This, rclsid, ddsurfaceimpl, (void **) lplpD3DDevice, 7);
 }
 
+HRESULT WINAPI
+GL_IDirect3DImpl_7_3T_CreateVertexBuffer(LPDIRECT3D7 iface,
+					 LPD3DVERTEXBUFFERDESC lpD3DVertBufDesc,
+					 LPDIRECT3DVERTEXBUFFER7* lplpD3DVertBuf,
+					 DWORD dwFlags)
+{
+    ICOM_THIS_FROM(IDirect3DImpl, IDirect3D7, iface);
+    IDirect3DVertexBufferImpl *vbimpl;
+    HRESULT res;
+    
+    TRACE("(%p/%p)->(%p,%p,%08lx)\n", This, iface, lpD3DVertBufDesc, lplpD3DVertBuf, dwFlags);
+
+    res = d3dvertexbuffer_create(&vbimpl, This, lpD3DVertBufDesc, dwFlags);
+
+    *lplpD3DVertBuf = ICOM_INTERFACE(vbimpl, IDirect3DVertexBuffer7);
+    
+    return res;
+}
+
 static void light_released(IDirect3DImpl *This, GLenum light_num)
 {
     IDirect3DGLImpl *glThis = (IDirect3DGLImpl *) This;
@@ -340,7 +359,7 @@ ICOM_VTABLE(IDirect3D7) VTABLE_IDirect3D7 =
     XCAST(Release) Main_IDirect3DImpl_7_3T_2T_1T_Release,
     XCAST(EnumDevices) GL_IDirect3DImpl_7_EnumDevices,
     XCAST(CreateDevice) GL_IDirect3DImpl_7_CreateDevice,
-    XCAST(CreateVertexBuffer) Main_IDirect3DImpl_7_3T_CreateVertexBuffer,
+    XCAST(CreateVertexBuffer) GL_IDirect3DImpl_7_3T_CreateVertexBuffer,
     XCAST(EnumZBufferFormats) GL_IDirect3DImpl_7_3T_EnumZBufferFormats,
     XCAST(EvictManagedTextures) Main_IDirect3DImpl_7_3T_EvictManagedTextures,
 };
diff --git a/dlls/ddraw/helper.c b/dlls/ddraw/helper.c
index 3f305fd35c1..53953a2f90b 100644
--- a/dlls/ddraw/helper.c
+++ b/dlls/ddraw/helper.c
@@ -315,7 +315,9 @@ void DDRAW_dump_lockflag(DWORD lockflag)
 	    FE(DDLOCK_EVENT),
 	    FE(DDLOCK_READONLY),
 	    FE(DDLOCK_WRITEONLY),
-	    FE(DDLOCK_NOSYSLOCK)
+	    FE(DDLOCK_NOSYSLOCK),
+	    FE(DDLOCK_DISCARDCONTENTS),
+	    FE(DDLOCK_NOOVERWRITE)
 	};
 
     DDRAW_dump_flags(lockflag, flags, sizeof(flags)/sizeof(flags[0]));
diff --git a/dlls/ddraw/mesa_private.h b/dlls/ddraw/mesa_private.h
index 884f602b58c..5fde8d397b1 100644
--- a/dlls/ddraw/mesa_private.h
+++ b/dlls/ddraw/mesa_private.h
@@ -119,7 +119,7 @@ extern HRESULT d3dlight_create(IDirect3DLightImpl **obj, IDirect3DImpl *d3d, GLe
 extern HRESULT d3dexecutebuffer_create(IDirect3DExecuteBufferImpl **obj, IDirect3DImpl *d3d, IDirect3DDeviceImpl *d3ddev, LPD3DEXECUTEBUFFERDESC lpDesc);
 extern HRESULT d3dmaterial_create(IDirect3DMaterialImpl **obj, IDirect3DImpl *d3d);
 extern HRESULT d3dviewport_create(IDirect3DViewportImpl **obj, IDirect3DImpl *d3d);
-extern HRESULT d3dvertexbuffer_create(IDirect3DVertexBufferImpl **obj, IDirect3DImpl *d3d, LPD3DVERTEXBUFFERDESC lpD3DVertBufDesc);
+extern HRESULT d3dvertexbuffer_create(IDirect3DVertexBufferImpl **obj, IDirect3DImpl *d3d, LPD3DVERTEXBUFFERDESC lpD3DVertBufDesc, DWORD dwFlags);
 extern HRESULT d3ddevice_create(IDirect3DDeviceImpl **obj, IDirect3DImpl *d3d, IDirectDrawSurfaceImpl *surface);
 
 /* Used for Direct3D to request the device to enumerate itself */
@@ -127,6 +127,10 @@ extern HRESULT d3ddevice_enumerate(LPD3DENUMDEVICESCALLBACK cb, LPVOID context,
 extern HRESULT d3ddevice_enumerate7(LPD3DENUMDEVICESCALLBACK7 cb, LPVOID context) ;
 extern HRESULT d3ddevice_find(IDirect3DImpl *d3d, LPD3DFINDDEVICESEARCH lpD3DDFS, LPD3DFINDDEVICERESULT lplpD3DDevice, DWORD interface_version);
 
+/* Some helper functions.. Would need to put them in a better place */
+extern void dump_flexible_vertex(DWORD d3dvtVertexType);
+extern DWORD get_flexible_vertex_size(DWORD d3dvtVertexType);
+
 /* Matrix copy WITH transposition */
 #define conv_mat2(mat,gl_mat)			\
 {						\
diff --git a/include/ddraw.h b/include/ddraw.h
index 845ea49be13..8fdd0a922d2 100644
--- a/include/ddraw.h
+++ b/include/ddraw.h
@@ -1319,6 +1319,8 @@ ICOM_DEFINE(IDirectDraw,IUnknown)
 #define DDLOCK_READONLY		0x00000010
 #define DDLOCK_WRITEONLY	0x00000020
 #define DDLOCK_NOSYSLOCK	0x00000800
+#define DDLOCK_NOOVERWRITE      0x00001000
+#define DDLOCK_DISCARDCONTENTS  0x00002000
 
 
 /*****************************************************************************