X-Git-Url: https://git.reactos.org/?p=reactos.git;a=blobdiff_plain;f=reactos%2Finclude%2Fpsdk%2Fshlwapi.h;h=835029a0b792fcd405908d78d5bb63f0a7f7281e;hp=485e7634ad97251ccd6ad2bef4411247d4673fac;hb=1a3f9719b5cbd90a60ec50a9396a5e945d557d45;hpb=fa9a309262753cbdc76339430da0119dbaea6731
diff --git a/reactos/include/psdk/shlwapi.h b/reactos/include/psdk/shlwapi.h
index 485e7634ad9..835029a0b79 100644
--- a/reactos/include/psdk/shlwapi.h
+++ b/reactos/include/psdk/shlwapi.h
@@ -2038,6 +2038,9 @@ QISearch(
_In_ REFIID riid,
_Outptr_ void **ppv);
+#define OFFSETOFCLASS(base, derived) \
+ ((DWORD)(DWORD_PTR)(static_cast((derived*)8))-8)
+
#include
#ifdef __cplusplus