Add util source and header with functions used in multiple locations.

util.h

@@ -0,0 +1,10 @@
+#ifndef _INCLUDE_UTIL_FUNCTIONS_H_
+#define _INCLUDE_UTIL_FUNCTIONS_H_
+
+#include "vhook.h"
+
+size_t GetParamOffset(HookParamsStruct *params, unsigned int index);
+void * GetObjectAddr(HookParamType type, unsigned int flags, void **params, size_t offset);
+size_t GetParamTypeSize(HookParamType type);
+size_t GetParamsSize(DHooksCallback *dg);
+#endif