Dynamic Link Libraries (DLL's) can be used to provide additional
cursor resources created with SDK or other toolkits, or to provide
dynamically callable subroutines. The file xlsx.c contains
startup and cleanup code for a DLL that seems to work with Borland
C++. This code can be linked with cursor resources or with code into a
DLL.
Once you have a DLL, the function load-dll can be used to load
a DLL. The return value of this function is an integer representing
the DLL handle. The function free-dll can be used to release
the library.