From 55c717e84cd87d841da49f4fbd3210efaa2479a0 Mon Sep 17 00:00:00 2001
From: David Hedberg <david.hedberg@gmail.com>
Date: Thu, 24 Mar 2011 22:38:50 +0100
Subject: [PATCH] comdlg32: Add DllGetClassObject and a default class factory.

---
 dlls/comdlg32/cdlg32.c      | 97 +++++++++++++++++++++++++++++++++++++
 dlls/comdlg32/comdlg32.spec |  1 +
 2 files changed, 98 insertions(+)

diff --git a/dlls/comdlg32/cdlg32.c b/dlls/comdlg32/cdlg32.c
index 950244346ce..0982dfbc68b 100644
--- a/dlls/comdlg32/cdlg32.c
+++ b/dlls/comdlg32/cdlg32.c
@@ -21,6 +21,8 @@
 
 #include <stdarg.h>
 
+#define COBJMACROS
+
 #include "windef.h"
 #include "winbase.h"
 #include "wingdi.h"
@@ -167,3 +169,98 @@ DWORD WINAPI CommDlgExtendedError(void)
 	else
 	  return 0; /* we never set an error, so there isn't one */
 }
+
+/*************************************************************************
+ * Implement the CommDlg32 class factory
+ *
+ * (Taken from shdocvw/factory.c; based on implementation in
+ *  ddraw/main.c)
+ */
+typedef struct
+{
+    IClassFactory IClassFactory_iface;
+    HRESULT (*cf)(IUnknown*, REFIID, void**);
+} IClassFactoryImpl;
+
+static inline IClassFactoryImpl *impl_from_IClassFactory(IClassFactory *iface)
+{
+    return CONTAINING_RECORD(iface, IClassFactoryImpl, IClassFactory_iface);
+}
+
+/*************************************************************************
+ * CDLGCF_QueryInterface (IUnknown)
+ */
+static HRESULT WINAPI CDLGCF_QueryInterface(IClassFactory* iface,
+                                            REFIID riid, void **ppobj)
+{
+    TRACE("%p (%s %p)\n", iface, debugstr_guid(riid), ppobj);
+
+    if(!ppobj)
+        return E_POINTER;
+
+    if(IsEqualGUID(&IID_IUnknown, riid) || IsEqualGUID(&IID_IClassFactory, riid))
+    {
+        *ppobj = iface;
+        IClassFactory_AddRef(iface);
+        return S_OK;
+    }
+
+    WARN("Interface not supported.\n");
+
+    *ppobj = NULL;
+    return E_NOINTERFACE;
+}
+
+/*************************************************************************
+ * CDLGCF_AddRef (IUnknown)
+ */
+static ULONG WINAPI CDLGCF_AddRef(IClassFactory *iface)
+{
+    return 2; /* non-heap based object */
+}
+
+/*************************************************************************
+ * CDLGCF_Release (IUnknown)
+ */
+static ULONG WINAPI CDLGCF_Release(IClassFactory *iface)
+{
+    return 1; /* non-heap based object */
+}
+
+/*************************************************************************
+ * CDLGCF_CreateInstance (IClassFactory)
+ */
+static HRESULT WINAPI CDLGCF_CreateInstance(IClassFactory *iface, IUnknown *pOuter,
+                                            REFIID riid, void **ppobj)
+{
+    IClassFactoryImpl *This = impl_from_IClassFactory(iface);
+    return This->cf(pOuter, riid, ppobj);
+}
+
+/*************************************************************************
+ * CDLGCF_LockServer (IClassFactory)
+ */
+static HRESULT WINAPI CDLGCF_LockServer(IClassFactory *iface, BOOL dolock)
+{
+    TRACE("%p (%d)\n", iface, dolock);
+    return S_OK;
+}
+
+static const IClassFactoryVtbl CDLGCF_Vtbl =
+{
+    CDLGCF_QueryInterface,
+    CDLGCF_AddRef,
+    CDLGCF_Release,
+    CDLGCF_CreateInstance,
+    CDLGCF_LockServer
+};
+
+/*************************************************************************
+ *              DllGetClassObject (COMMDLG32.@)
+ */
+HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, void **ppv)
+{
+    TRACE("%s, %s, %p\n", debugstr_guid(rclsid), debugstr_guid(riid), ppv);
+
+    return CLASS_E_CLASSNOTAVAILABLE;
+}
diff --git a/dlls/comdlg32/comdlg32.spec b/dlls/comdlg32/comdlg32.spec
index 618ccd00266..118d3d770c5 100644
--- a/dlls/comdlg32/comdlg32.spec
+++ b/dlls/comdlg32/comdlg32.spec
@@ -3,6 +3,7 @@
 @ stdcall ChooseFontA(ptr)
 @ stdcall ChooseFontW(ptr)
 @ stdcall CommDlgExtendedError()
+@ stdcall -private DllGetClassObject(ptr ptr ptr)
 @ stdcall FindTextA(ptr)
 @ stdcall FindTextW(ptr)
 @ stdcall GetFileTitleA(str ptr long)