Creating string of hashes from PVOID variable

[Airick73]

I was trying to find a way to create a string of hashes from a PVOID variable in a for loop. For reference I have the following code

resultTempList->Items[i] is a PVOID*
jsonString is a PHH_STRING.

Inside the MDCBuildJsonArray function I want to retrieve the hash from resultTempList->Items[i] and concatenate it to jsonString. Note I am able to successfully retrieve the hash with the following method.

My problem is finding a good function within Process Hacker that successfully concatenate a string. I've tried the functions such as PPH_STRING PhConcatStrings2( _In_ PWSTR String1, _In_ PWSTR String2 ) and PPH_STRING PhConcatStringRef2( _In_ PPH_STRINGREF String1, _In_ PPH_STRINGREF String2 ) but they seem to lead to errors which lead to no where for me such as Ntdll.dll. If anyone has experience with concatenating strings from different objects within Process Hacker and can share insight I would greatly appreciate it.