Files like VB, CPP, H, C, TLH, TLI and many others are name-searchable from the search textbox in start orb or from within Windows Explorer.
Except for VB files, all others are also content-searchable.
VB files are not content-searchable because there is a missing key setting in the Registry, pertaining to the VB files extension: in the Registry the setting for * PersistentHandler * is missing, making VB files are not content-searchable.
Suppose you want to find all files with the word CreateInstance. The Win7 and Win8DP search engines will find all files containing that word, except VB files, because they won't have their content indexed by the search engine, due to the missing key * PersistentHandler *.
This missing key should be set in the Registry by the VS11DP installation program.
I consider this report falls in the Usablity category, but it is inexistent. For this reason, I choose Performance in the combo box below.