derhalt

It is not possible to create an equivalent to your C# structure in Labview. What Labview creates will be something like this: (C++-Syntax) struct TPCANMsg{ unsigned int ID; char MSGTYPE; char LEN; LVArray** Data; } struct LVArray{ int Length; char Data[1]; } You also have to check that your dll uses 1byte struct member alignment. This is what LabView expects.