shdocvw: Register InternetExplorer class factory in IEWinMain.

Based on a patch by Mike McCormack.

dlls/shdocvw/factory.c

@@ -138,3 +138,28 @@ HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, void **ppv)
     /* As a last resort, figure if the CLSID belongs to a 'Shell Instance Object' */
     return SHDOCVW_GetShellInstanceObjectClassObject(rclsid, riid, ppv);
 }
+
+HRESULT register_class_object(BOOL do_reg)
+{
+    HRESULT hres;
+
+    static DWORD cookie;
+    static IClassFactoryImpl IEClassFactory = {&WBCF_Vtbl, InternetExplorer_Create};
+
+    if(do_reg) {
+        hres = CoRegisterClassObject(&CLSID_InternetExplorer, (IUnknown*)FACTORY(&IEClassFactory),
+                                     CLSCTX_SERVER, REGCLS_MULTIPLEUSE|REGCLS_SUSPENDED, &cookie);
+        if (FAILED(hres)) {
+            ERR("failed to register object %08lx\n", hres);
+            return hres;
+        }
+
+        hres = CoResumeClassObjects();
+        if(SUCCEEDED(hres))
+            return hres;
+
+        ERR("failed to resume object %08lx\n", hres);
+    }
+
+    return CoRevokeClassObject(cookie);
+}

dlls/shdocvw/iexplore.c

@@ -590,11 +590,18 @@ DWORD WINAPI IEWinMain(LPSTR szCommandLine, int nShowWindow)
 {
     LPWSTR url;
     DWORD len;
+    HRESULT hres;
 
     FIXME("%s %d\n", debugstr_a(szCommandLine), nShowWindow);
 
     CoInitialize(NULL);
 
+    hres = register_class_object(TRUE);
+    if(FAILED(hres)) {
+        CoUninitialize();
+        ExitProcess(1);
+    }
+
     /* FIXME: parse the command line properly, handle -Embedding */
 
     len = MultiByteToWideChar(CP_ACP, 0, szCommandLine, -1, NULL, 0);
@@ -605,6 +612,8 @@ DWORD WINAPI IEWinMain(LPSTR szCommandLine, int nShowWindow)
 
     HeapFree(GetProcessHeap(), 0, url);
 
+    register_class_object(FALSE);
+
     CoUninitialize();
 
     ExitProcess(0);

dlls/shdocvw/shdocvw.h

@@ -200,4 +200,6 @@ extern void register_iewindow_class(void);
 extern void unregister_iewindow_class(void);
 extern BOOL create_ie_window(LPCWSTR url);
 
+HRESULT register_class_object(BOOL);
+
 #endif /* __WINE_SHDOCVW_H */