diff --git a/dlls/d3dx10_43/async.c b/dlls/d3dx10_43/async.c
index 36110d20712..f49eb92c8e8 100644
--- a/dlls/d3dx10_43/async.c
+++ b/dlls/d3dx10_43/async.c
@@ -67,3 +67,38 @@ HRESULT WINAPI D3DX10CreateEffectPoolFromFileW(const WCHAR *filename, const D3D1
 
     return E_NOTIMPL;
 }
+
+HRESULT WINAPI D3DX10CreateAsyncMemoryLoader(const void *data, SIZE_T data_size, ID3DX10DataLoader **loader)
+{
+    FIXME("data %p, data_size %lu, loader %p stub!\n", data, data_size, loader);
+
+    return E_NOTIMPL;
+}
+
+HRESULT WINAPI D3DX10CreateAsyncFileLoaderA(const char *filename, ID3DX10DataLoader **loader)
+{
+    FIXME("filename %s, loader %p stub!\n", debugstr_a(filename), loader);
+
+    return E_NOTIMPL;
+}
+
+HRESULT WINAPI D3DX10CreateAsyncFileLoaderW(const WCHAR *filename, ID3DX10DataLoader **loader)
+{
+    FIXME("filename %s, loader %p stub!\n", debugstr_w(filename), loader);
+
+    return E_NOTIMPL;
+}
+
+HRESULT WINAPI D3DX10CreateAsyncResourceLoaderA(HMODULE module, const char *resource, ID3DX10DataLoader **loader)
+{
+    FIXME("module %p, resource %s, loader %p stub!\n", module, debugstr_a(resource), loader);
+
+    return E_NOTIMPL;
+}
+
+HRESULT WINAPI D3DX10CreateAsyncResourceLoaderW(HMODULE module, const WCHAR *resource, ID3DX10DataLoader **loader)
+{
+    FIXME("module %p, resource %s, loader %p stub!\n", module, debugstr_w(resource), loader);
+
+    return E_NOTIMPL;
+}
diff --git a/dlls/d3dx10_43/d3dx10_43.spec b/dlls/d3dx10_43/d3dx10_43.spec
index 61f16feef16..49a6d3adda5 100644
--- a/dlls/d3dx10_43/d3dx10_43.spec
+++ b/dlls/d3dx10_43/d3dx10_43.spec
@@ -9,11 +9,11 @@
 @ stub D3DX10CreateAsyncCompilerProcessor(str ptr ptr str str long long ptr ptr ptr)
 @ stub D3DX10CreateAsyncEffectCreateProcessor(str ptr ptr str long long ptr ptr ptr ptr)
 @ stub D3DX10CreateAsyncEffectPoolCreateProcessor(str ptr ptr str long long ptr ptr ptr)
-@ stub D3DX10CreateAsyncFileLoaderA(str ptr)
-@ stub D3DX10CreateAsyncFileLoaderW(wstr ptr)
-@ stub D3DX10CreateAsyncMemoryLoader(ptr long ptr)
-@ stub D3DX10CreateAsyncResourceLoaderA(long str ptr)
-@ stub D3DX10CreateAsyncResourceLoaderW(long wstr ptr)
+@ stdcall D3DX10CreateAsyncFileLoaderA(str ptr)
+@ stdcall D3DX10CreateAsyncFileLoaderW(wstr ptr)
+@ stdcall D3DX10CreateAsyncMemoryLoader(ptr long ptr)
+@ stdcall D3DX10CreateAsyncResourceLoaderA(long str ptr)
+@ stdcall D3DX10CreateAsyncResourceLoaderW(long wstr ptr)
 @ stub D3DX10CreateAsyncShaderPreprocessProcessor(str ptr ptr ptr ptr ptr)
 @ stub D3DX10CreateAsyncShaderResourceViewProcessor(ptr ptr ptr)
 @ stub D3DX10CreateAsyncTextureInfoProcessor(ptr ptr)
diff --git a/dlls/d3dx10_43/tests/d3dx10.c b/dlls/d3dx10_43/tests/d3dx10.c
index d91dbdc3a6a..2eccb69d3bb 100644
--- a/dlls/d3dx10_43/tests/d3dx10.c
+++ b/dlls/d3dx10_43/tests/d3dx10.c
@@ -605,7 +605,107 @@ float4 main(float4 color : COLOR) : SV_TARGET
     ok(!refcount, "Device has %u references left.\n", refcount);
 }
 
+static void test_D3DX10CreateAsyncMemoryLoader(void)
+{
+    ID3DX10DataLoader *loader;
+    SIZE_T size;
+    DWORD data;
+    HRESULT hr;
+    void *ptr;
+
+    hr = D3DX10CreateAsyncMemoryLoader(NULL, 0, NULL);
+    todo_wine ok(hr == E_FAIL, "Got unexpected hr %#x.\n", hr);
+
+    hr = D3DX10CreateAsyncMemoryLoader(NULL, 0, &loader);
+    todo_wine ok(hr == E_FAIL, "Got unexpected hr %#x.\n", hr);
+
+    hr = D3DX10CreateAsyncMemoryLoader(&data, 0, &loader);
+    todo_wine ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
+
+    if (FAILED(hr))
+        return;
+
+    size = 100;
+    hr = ID3DX10DataLoader_Decompress(loader, &ptr, &size);
+    ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
+    ok(ptr == &data, "Got data pointer %p, original %p.\n", ptr, &data);
+    ok(!size, "Got unexpected data size.\n");
+
+    /* Load() is no-op. */
+    hr = ID3DX10DataLoader_Load(loader);
+    ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
+
+    hr = ID3DX10DataLoader_Destroy(loader);
+    ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
+
+    data = 0;
+    hr = D3DX10CreateAsyncMemoryLoader(&data, sizeof(data), &loader);
+    ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
+
+    /* Load() is no-op. */
+    hr = ID3DX10DataLoader_Load(loader);
+    ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
+
+    hr = ID3DX10DataLoader_Decompress(loader, &ptr, &size);
+    ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
+    ok(ptr == &data, "Got data pointer %p, original %p.\n", ptr, &data);
+    ok(size == sizeof(data), "Got unexpected data size.\n");
+
+    hr = ID3DX10DataLoader_Destroy(loader);
+    ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
+}
+
+static void test_D3DX10CreateAsyncFileLoader(void)
+{
+    ID3DX10DataLoader *loader;
+    SIZE_T size;
+    HRESULT hr;
+    void *ptr;
+
+    hr = D3DX10CreateAsyncFileLoaderA(NULL, NULL);
+    todo_wine ok(hr == E_FAIL, "Got unexpected hr %#x.\n", hr);
+
+    hr = D3DX10CreateAsyncFileLoaderA(NULL, &loader);
+    todo_wine ok(hr == E_FAIL, "Got unexpected hr %#x.\n", hr);
+
+    hr = D3DX10CreateAsyncFileLoaderA("nonexistentfilename", &loader);
+    todo_wine ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
+
+    if (FAILED(hr))
+        return;
+
+    hr = ID3DX10DataLoader_Decompress(loader, &ptr, &size);
+    ok(hr == E_FAIL, "Got unexpected hr %#x.\n", hr);
+
+    hr = ID3DX10DataLoader_Load(loader);
+    ok(hr == D3D10_ERROR_FILE_NOT_FOUND, "Got unexpected hr %#x.\n", hr);
+
+    hr = ID3DX10DataLoader_Decompress(loader, &ptr, &size);
+    ok(hr == E_FAIL, "Got unexpected hr %#x.\n", hr);
+
+    hr = ID3DX10DataLoader_Destroy(loader);
+    ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
+}
+
+static void test_D3DX10CreateAsyncResourceLoader(void)
+{
+    ID3DX10DataLoader *loader;
+    HRESULT hr;
+
+    hr = D3DX10CreateAsyncResourceLoaderA(NULL, NULL, NULL);
+    todo_wine ok(hr == E_FAIL, "Got unexpected hr %#x.\n", hr);
+
+    hr = D3DX10CreateAsyncResourceLoaderA(NULL, NULL, &loader);
+    todo_wine ok(hr == D3DX10_ERR_INVALID_DATA, "Got unexpected hr %#x.\n", hr);
+
+    hr = D3DX10CreateAsyncResourceLoaderA(NULL, "nonexistentresourcename", &loader);
+    todo_wine ok(hr == D3DX10_ERR_INVALID_DATA, "Got unexpected hr %#x.\n", hr);
+}
+
 START_TEST(d3dx10)
 {
     test_D3DX10UnsetAllDeviceObjects();
+    test_D3DX10CreateAsyncMemoryLoader();
+    test_D3DX10CreateAsyncFileLoader();
+    test_D3DX10CreateAsyncResourceLoader();
 }
diff --git a/include/d3dx10.h b/include/d3dx10.h
index fb48723b5f3..7062d24ea09 100644
--- a/include/d3dx10.h
+++ b/include/d3dx10.h
@@ -32,4 +32,20 @@
 #include "d3dx10async.h"
 #include "d3dx10tex.h"
 
+#define _FACDD 0x876
+#define MAKE_DDHRESULT(code) MAKE_HRESULT(1, _FACDD, code)
+
+enum _D3DX10_ERR
+{
+    D3DX10_ERR_CANNOT_MODIFY_INDEX_BUFFER = MAKE_DDHRESULT(2900),
+    D3DX10_ERR_INVALID_MESH               = MAKE_DDHRESULT(2901),
+    D3DX10_ERR_CANNOT_ATTR_SORT           = MAKE_DDHRESULT(2902),
+    D3DX10_ERR_SKINNING_NOT_SUPPORTED     = MAKE_DDHRESULT(2903),
+    D3DX10_ERR_TOO_MANY_INFLUENCES        = MAKE_DDHRESULT(2904),
+    D3DX10_ERR_INVALID_DATA               = MAKE_DDHRESULT(2905),
+    D3DX10_ERR_LOADED_MESH_HAS_NO_DATA    = MAKE_DDHRESULT(2906),
+    D3DX10_ERR_DUPLICATE_NAMED_FRAGMENT   = MAKE_DDHRESULT(2907),
+    D3DX10_ERR_CANNOT_REMOVE_LAST_ITEM    = MAKE_DDHRESULT(2908)
+};
+
 #endif
diff --git a/include/d3dx10async.h b/include/d3dx10async.h
index 364ad129d5c..6663be451c9 100644
--- a/include/d3dx10async.h
+++ b/include/d3dx10async.h
@@ -54,4 +54,10 @@ HRESULT WINAPI D3DX10CreateEffectPoolFromMemory(const void *data, SIZE_T datasiz
         UINT fxflags, ID3D10Device *device, ID3DX10ThreadPump *pump, ID3D10EffectPool **effectpool,
         ID3D10Blob **errors, HRESULT *hresult);
 
+HRESULT WINAPI D3DX10CreateAsyncFileLoaderW(const WCHAR *filename, ID3DX10DataLoader **loader);
+HRESULT WINAPI D3DX10CreateAsyncFileLoaderA(const char *filename, ID3DX10DataLoader **loader);
+HRESULT WINAPI D3DX10CreateAsyncMemoryLoader(const void *data, SIZE_T datasize, ID3DX10DataLoader **loader);
+HRESULT WINAPI D3DX10CreateAsyncResourceLoaderA(HMODULE module, const char *resource, ID3DX10DataLoader **loader);
+HRESULT WINAPI D3DX10CreateAsyncResourceLoaderW(HMODULE module, const WCHAR *resource, ID3DX10DataLoader **loader);
+
 #endif