dpnet: Implement IDirectPlay8Client Initialize.

dlls/dpnet/client.c

@@ -87,7 +87,16 @@ static HRESULT WINAPI IDirectPlay8ClientImpl_Initialize(IDirectPlay8Client *ifac
         void * const pvUserContext, const PFNDPNMESSAGEHANDLER pfn, const DWORD dwFlags)
 {
     IDirectPlay8ClientImpl *This = impl_from_IDirectPlay8Client(iface);
-  FIXME("(%p):(%p,%p,%x): Stub\n", This, pvUserContext, pfn, dwFlags);
+
+    TRACE("(%p):(%p,%p,%x)\n", This, pvUserContext, pfn, dwFlags);
+
+    if(!pfn)
+        return DPNERR_INVALIDPARAM;
+
+    This->usercontext = pvUserContext;
+    This->msghandler = pfn;
+    This->flags = dwFlags;
+
     return DPN_OK;
 }
 

dlls/dpnet/dpnet_private.h

@@ -48,7 +48,11 @@ struct IDirectPlay8ClientImpl
 {
     IDirectPlay8Client IDirectPlay8Client_iface;
     LONG ref;
+
     /* IDirectPlay8Client fields */
+    PFNDPNMESSAGEHANDLER msghandler;
+    DWORD flags;
+    void *usercontext;
 };
 
 /* ------------------- */

dlls/dpnet/tests/client.c

@@ -44,7 +44,7 @@ static BOOL test_init_dp(void)
     ok(hr == S_OK, "CoCreateInstance failed with 0x%x\n", hr);
 
     hr = IDirectPlay8Client_Initialize(client, NULL, NULL, 0);
-    todo_wine ok(hr == DPNERR_INVALIDPARAM, "got %x\n", hr);
+    ok(hr == DPNERR_INVALIDPARAM, "got %x\n", hr);
 
     hr = IDirectPlay8Client_Initialize(client, NULL, DirectPlayMessageHandler, 0);
     ok(hr == S_OK, "IDirectPlay8Client_Initialize failed with %x\n", hr);