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1. The supported types are:
1. void: No return value
1. ok: Return TCL\_OK or TCL_ERROR
1. int
1. long
1. float
1. double
1. char*: TCL_STATIC string (immutable from C)
1. string, dstring: TCL_DYNAMIC string (mutable from C)
1. vstring: TCL_VOLATILE string (mutable from C)
1. char*: TCL_STATIC string (immutable from C -- use this for constants)
1. string, dstring: TCL_DYNAMIC string (allocated from Tcl_Alloc, will be managed by Tcl)
1. vstring: TCL_VOLATILE string (mutable from C, will be copied be Tcl -- use this for local variables)
1. default: Tcl_Obj*, a Tcl Object
1. `<code>` is the C code that comprises the function
Examples:
1. Create a Tcl procedure called "add" which accepts 2 integers (a, b) and returns a long:
1. `tcc4tcl::cproc add {int a int b} long { return(a+b); }`
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