Updated 2015-03-01 04:17:25 by RLE

Original JO book remains best explanation.

General topic of working with Tcl in C, including pertinent chapters [1] [2] from Brent Welch book Book Practical Programming in Tcl and Tk. Notice correct emphasis on distinction between C source and its construction.

Clif's book.

Very important: generic/tkSquare.c example