ole32: Check for COM not being initialised and an invalid window handle being…

dlls/ole32/ole2.c

@@ -289,9 +289,18 @@ HRESULT WINAPI RegisterDragDrop(
 
   TRACE("(%p,%p)\n", hwnd, pDropTarget);
 
+  if (!COM_CurrentApt())
+  {
+    ERR("COM not initialized\n");
+    return CO_E_NOTINITIALIZED;
+  }
+
   if (!pDropTarget)
     return E_INVALIDARG;
-  
+
+  if (!IsWindow(hwnd))
+    return DRAGDROP_E_INVALIDHWND;
+
   /*
    * First, check if the window is already registered.
    */

dlls/ole32/tests/dragdrop.c

@@ -113,7 +113,6 @@ START_TEST(dragdrop)
     HRESULT hr;
 
     hr = RegisterDragDrop(GetDesktopWindow(), &DropTarget);
-    todo_wine
     ok(hr == CO_E_NOTINITIALIZED, "RegisterDragDrop without OLE initialized should have returned CO_E_NOTINITIALIZED instead of 0x%08x\n", hr);
 
     OleInitialize(NULL);
@@ -122,19 +121,14 @@ START_TEST(dragdrop)
     ok(hr == E_INVALIDARG, "RegisterDragDrop with NULL IDropTarget * should return E_INVALIDARG instead of 0x%08x\n", hr);
 
     hr = RegisterDragDrop(NULL, &DropTarget);
-    todo_wine
     ok(hr == DRAGDROP_E_INVALIDHWND, "RegisterDragDrop with NULL hwnd should return DRAGDROP_E_INVALIDHWND instead of 0x%08x\n", hr);
 
     hr = RegisterDragDrop((HWND)0xdeadbeef, &DropTarget);
-    todo_wine
     ok(hr == DRAGDROP_E_INVALIDHWND, "RegisterDragDrop with garbage hwnd should return DRAGDROP_E_INVALIDHWND instead of 0x%08x\n", hr);
 
-    todo_wine
     ok(droptarget_addref_called == 0, "DropTarget_AddRef shouldn't have been called\n");
     hr = RegisterDragDrop(GetDesktopWindow(), &DropTarget);
-    todo_wine
     ok_ole_success(hr, "RegisterDragDrop");
-    todo_wine
     ok(droptarget_addref_called == 1, "DropTarget_AddRef should have been called once, not %d times\n", droptarget_addref_called);
 
     hr = RegisterDragDrop(GetDesktopWindow(), &DropTarget);
@@ -148,7 +142,6 @@ START_TEST(dragdrop)
     hr = RevokeDragDrop(GetDesktopWindow());
     todo_wine
     ok_ole_success(hr, "RevokeDragDrop");
-    todo_wine
     ok(droptarget_release_called == 1, "DropTarget_Release should have been called once, not %d times\n", droptarget_release_called);
 
     hr = RevokeDragDrop(NULL);