diff --git a/dlls/xmllite/tests/writer.c b/dlls/xmllite/tests/writer.c
index 25257624f50..53f3297597e 100644
--- a/dlls/xmllite/tests/writer.c
+++ b/dlls/xmllite/tests/writer.c
@@ -456,6 +456,9 @@ static void test_invalid_output_encoding(IXmlWriter *writer, IUnknown *output)
     hr = IXmlWriter_WriteChars(writer, L"a", 1);
     ok(hr == MX_E_ENCODING, "Unexpected hr %#lx.\n", hr);
 
+    hr = IXmlWriter_WriteRawChars(writer, L"a", 1);
+    ok(hr == MX_E_ENCODING, "Unexpected hr %#lx.\n", hr);
+
     hr = IXmlWriter_Flush(writer);
     ok(hr == S_OK, "Failed to flush, hr %#lx.\n", hr);
 
@@ -1906,6 +1909,118 @@ static void test_WriteCharEntity(void)
     IStream_Release(stream);
 }
 
+static void test_WriteRawChars(void)
+{
+    IXmlWriter *writer;
+    IStream *stream;
+    HRESULT hr;
+    static WCHAR surrogates[] = {0xd800, 0xdc00, 0};
+
+    hr = CreateXmlWriter(&IID_IXmlWriter, (void**)&writer, NULL);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_WriteRawChars(writer, NULL, 0);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_WriteRawChars(writer, L"", 0);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_WriteRawChars(writer, NULL, 5);
+    ok(hr == E_INVALIDARG, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_WriteRawChars(writer, L"", 6);
+    ok(hr == E_UNEXPECTED, "Unexpected hr %#lx.\n", hr);
+
+    stream = writer_set_output(writer);
+
+    hr = IXmlWriter_WriteStartElement(writer, NULL, L"sub", NULL);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_WriteRawChars(writer, L"<rawChars>", 5);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_Flush(writer);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    CHECK_OUTPUT(stream, "<sub><rawC");
+    IStream_Release(stream);
+
+    stream = writer_set_output(writer);
+
+    hr = IXmlWriter_WriteRawChars(writer, L"a", 1);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_WriteStartElement(writer, NULL, L"sub", NULL);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_WriteRawChars(writer, L"<;;>", 10);
+    ok(hr == WC_E_XMLCHARACTER, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_Flush(writer);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    CHECK_OUTPUT(stream, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>a<sub><;;>");
+    IStream_Release(stream);
+
+    stream = writer_set_output(writer);
+
+    hr = IXmlWriter_WriteStartElement(writer, NULL, L"sub", NULL);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_WriteRawChars(writer, surrogates, 1);
+    ok(hr == WR_E_INVALIDSURROGATEPAIR, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_WriteRawChars(writer, surrogates, 2);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_Flush(writer);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    CHECK_OUTPUT(stream, "<sub>\U00010000");
+    IStream_Release(stream);
+
+    stream = writer_set_output(writer);
+
+    hr = IXmlWriter_WriteStartElement(writer, NULL, L"sub", NULL);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_WriteRawChars(writer, L"", 5);
+    ok(hr == WC_E_XMLCHARACTER, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_Flush(writer);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    CHECK_OUTPUT(stream, "<sub>");
+    IStream_Release(stream);
+
+    stream = writer_set_output(writer);
+
+    hr = IXmlWriter_WriteStartElement(writer, NULL, L"sub", NULL);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_WriteRawChars(writer, L"", 0);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_Flush(writer);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
+    CHECK_OUTPUT(stream, "<sub");
+
+    IStream_Release(stream);
+
+    stream = writer_set_output(writer);
+
+    /* Force document close */
+    hr = IXmlWriter_WriteEndElement(writer);
+    ok(hr == WR_E_INVALIDACTION, "Unexpected hr %#lx.\n", hr);
+
+    hr = IXmlWriter_WriteRawChars(writer, L"a", 1);
+    ok(hr == WR_E_INVALIDACTION, "Unexpected hr %#lx.\n", hr);
+
+    IStream_Release(stream);
+    IXmlWriter_Release(writer);
+}
+
 static void test_WriteString(void)
 {
     static const WCHAR surrogates[] = {0xd800, 0xdc00, 'x', 'y', '\0'};
@@ -2787,6 +2902,7 @@ START_TEST(writer)
     test_WriteFullEndElement();
     test_WriteCharEntity();
     test_WriteChars();
+    test_WriteRawChars();
     test_WriteString();
     test_WriteDocType();
     test_WriteWhitespace();
diff --git a/dlls/xmllite/writer.c b/dlls/xmllite/writer.c
index 9a2e75ec452..55fe6ab05d7 100644
--- a/dlls/xmllite/writer.c
+++ b/dlls/xmllite/writer.c
@@ -1808,13 +1808,21 @@ static HRESULT WINAPI xmlwriter_WriteRaw(IXmlWriter *iface, LPCWSTR data)
     return hr;
 }
 
-static HRESULT WINAPI xmlwriter_WriteRawChars(IXmlWriter *iface,  const WCHAR *pwch, UINT cwch)
+static HRESULT WINAPI xmlwriter_WriteRawChars(IXmlWriter *iface,  const WCHAR *characters, UINT length)
 {
-    xmlwriter *This = impl_from_IXmlWriter(iface);
+    xmlwriter *writer = impl_from_IXmlWriter(iface);
+    HRESULT hr = S_OK;
+    unsigned int count;
 
-    FIXME("%p %s %d\n", This, wine_dbgstr_w(pwch), cwch);
+    TRACE("%p, %s, %d.\n", iface, debugstr_wn(characters, length), length);
 
-    switch (This->state)
+    if ((characters == NULL && length != 0))
+        return E_INVALIDARG;
+
+    if (length == 0)
+        return S_OK;
+
+    switch (writer->state)
     {
     case XmlWriterState_Initial:
         return E_UNEXPECTED;
@@ -1822,11 +1830,25 @@ static HRESULT WINAPI xmlwriter_WriteRawChars(IXmlWriter *iface,  const WCHAR *p
         return MX_E_ENCODING;
     case XmlWriterState_DocClosed:
         return WR_E_INVALIDACTION;
+    case XmlWriterState_Ready:
+        write_xmldecl(writer, XmlStandalone_Omit);
+        break;
+    case XmlWriterState_ElemStarted:
+        writer_close_starttag(writer);
     default:
         ;
     }
 
-    return E_NOTIMPL;
+    while (length)
+    {
+        if (FAILED(hr = writer_get_next_write_count(characters, length, &count))) return hr;
+        if (FAILED(hr = write_output_buffer(writer->output, characters, count))) return hr;
+
+        characters += count;
+        length -= count;
+    }
+
+    return hr;
 }
 
 static HRESULT WINAPI xmlwriter_WriteStartDocument(IXmlWriter *iface, XmlStandalone standalone)