pCDInfo==NULL

vbimport
#1

C++ Builder 5, NeroCom

In the line

if(pCDInfo==NULL) return;

error
[C++ Error] MainUnit.cpp(53): E2015 Ambiguity between ‘INeroCDInfoPtr::operator INeroCDInfo *() const’ and ‘INeroCDInfoPtr::operator bool() const’

#2

Assuming there is analogy with MSVC++, you may try using pCDInfo.p == NULL instead.