user32: Make GetWindowLong() fail for some values on 64-bit.

dlls/user32/tests/win.c

@@ -6346,7 +6346,6 @@ static void test_set_window_long_size(void)
     /* GWLP_WNDPROC */
     SetLastError(0xdeadbeef);
     wnd_proc = (WNDPROC)(LONG_PTR)GetWindowLongA(hwnd, GWLP_WNDPROC);
-todo_wine
     ok(!wnd_proc && GetLastError() == ERROR_INVALID_INDEX, "Unexpected window proc.\n");
 
     wnd_proc = (WNDPROC)GetWindowLongPtrA(hwnd, GWLP_WNDPROC);
@@ -6427,12 +6426,10 @@ todo_wine
 
     SetLastError(0xdeadbeef);
     ret = GetWindowLongA(hwnd, GWLP_HINSTANCE);
-todo_wine
     ok(!ret && GetLastError() == ERROR_INVALID_INDEX, "Unexpected instance %#x.\n", ret);
 
     SetLastError(0xdeadbeef);
     ret = GetWindowLongW(hwnd, GWLP_HINSTANCE);
-todo_wine
     ok(!ret && GetLastError() == ERROR_INVALID_INDEX, "Unexpected instance %#x.\n", ret);
 
     SetLastError(0xdeadbeef);
@@ -6451,7 +6448,6 @@ todo_wine
     /* GWLP_HWNDPARENT */
     SetLastError(0xdeadbeef);
     ret = GetWindowLongA(hwnd, GWLP_HWNDPARENT);
-todo_wine
     ok(!ret && GetLastError() == ERROR_INVALID_INDEX, "Unexpected parent window %#x.\n", ret);
 
     SetLastError(0xdeadbeef);

dlls/user32/win.c

@@ -2690,7 +2690,19 @@ WORD WINAPI GetWindowWord( HWND hwnd, INT offset )
  */
 LONG WINAPI GetWindowLongA( HWND hwnd, INT offset )
 {
-    return WIN_GetWindowLong( hwnd, offset, sizeof(LONG), FALSE );
+    switch (offset)
+    {
+#ifdef _WIN64
+    case GWLP_WNDPROC:
+    case GWLP_HINSTANCE:
+    case GWLP_HWNDPARENT:
+        WARN( "Invalid offset %d\n", offset );
+        SetLastError( ERROR_INVALID_INDEX );
+        return 0;
+#endif
+    default:
+        return WIN_GetWindowLong( hwnd, offset, sizeof(LONG), FALSE );
+    }
 }
 
 
@@ -2699,7 +2711,19 @@ LONG WINAPI GetWindowLongA( HWND hwnd, INT offset )
  */
 LONG WINAPI GetWindowLongW( HWND hwnd, INT offset )
 {
-    return WIN_GetWindowLong( hwnd, offset, sizeof(LONG), TRUE );
+    switch (offset)
+    {
+#ifdef _WIN64
+    case GWLP_WNDPROC:
+    case GWLP_HINSTANCE:
+    case GWLP_HWNDPARENT:
+        WARN( "Invalid offset %d\n", offset );
+        SetLastError( ERROR_INVALID_INDEX );
+        return 0;
+#endif
+    default:
+        return WIN_GetWindowLong( hwnd, offset, sizeof(LONG), TRUE );
+    }
 }