Converted urlmon.h to IDL.

include/wtypes.h

diff --git a/include/wtypes.h b/include/wtypes.h
index 3d79234..ae79eff 100644
--- a/include/wtypes.h
+++ b/include/wtypes.h
@@ -131,6 +131,12 @@
     PACL Dacl;
 } SECURITY_DESCRIPTOR, *PSECURITY_DESCRIPTOR;
 
+typedef struct _SECURITY_ATTRIBUTES {
+    DWORD nLength;
+    LPVOID lpSecurityDescriptor;
+    BOOL bInheritHandle;
+} SECURITY_ATTRIBUTES, *PSECURITY_ATTRIBUTES, *LPSECURITY_ATTRIBUTES;
+
 typedef struct tagSIZE {
     LONG cx;
     LONG cy;