.h -- absolutely not. Header files (with a .h extension) are part of C/C++ source code, therefore they will only make sense to a C/C++ compiler.
.lib -- maybe, I'm not a VB programmer.
.dll -- Yes. That is what [tt]Public Declare Function ... Lib "************"[/tt] for all the Windows API calls is all about.
I REALLY hope that helps.
Will