http://www.purl.org/tcl/home/man/tcl8.4/TclCmd/load.htm 

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   * What does one need to create an extension to be loaded?

   * What does one need to load Tk?


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[Clif Flynt] has made available a useful C extension to load shared 
libraries that don't know anything about tcl's _Init function.

The extension allows one  to invoke dlopen
to load libraries that do not have Tcl entry points (for use by other
things that do have legitimate foo_Init entry points).

The dlopen extension is available at:

http://noucorp.com/cgi-bin/noucorp/generic.tcl?dir=/home/httpd/html/tcl/utilities

It's a minimal, single C file extension, but it has been known to work on both
Windows and Posix (just retested on Linux)




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So what do you do when load, or, even more mysteriously, [package],
fails?  There are many, many ways for this to happen, and typical
built-in diagnostics from supplied loaders are inscrutable.

One handy tool for such situations is a dependency utility.  Under
Windows, DependencyWalker
[http://www.dependencywalker.com/]
walks dependencies.












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