Which flags in CMake dictates creation of DLLs rather than Libs?

I just noticed my MSVC projects generate .libs such as Manta_Core.lib rather than Manta_Core.dll. I could manually convert them but the settings will be gone when CMake regenerates the .vcprojs.

Also:

When I manually converted the vcproj for Manta_core from generating .lib to .dll, Winnm.lib was not linked and caused linking error for the timeBeginPeriod() function. I notice that this lib is mentioned in Core/CMakelist.txt, but doesn’t seem to have made a difference.

Thanks

Bo