unresolved external symbol

Hello everybody,
I´m trying to program an application which creates HDF5-files and building it, I get many errors of the kind

"unresolved external symbol "_H5Sclose" referenced in function "void __cdecl writeCoordinateH5File"
regarding H5Sclose, H5Fcreate,H5Screate_simple, H5Tcopy, H5Tset_order, etc.

It seems I miss to link a library, but which one?

thx for help,
NH

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