You will not need to create a .lsb file. The recommended method of handling structs with strings with Call Library Function Node is as follows:
1. Use DSNewPtr, MoveBlock to allocate string in LabVIEW, copy contents into allocated space. These functions are accessible via Call Library Function Node, set library to LabVIEW.
2. Use Call Library Function Node to call function in C DLL. Pass cluster in, use
Adapt to Type and
Pointers to Handles.
3. Dispose of allocated string in LabVIEW with DSDisposePtr.
Additional Information
See the community forum discussion
Solved: Passing Cluster Containing Strings in C DLL as Struct for example code and further discussion.