The following global symbols are defined by
Tk_Window, useful for obtaining X information such as colourmaps
error(char *format,...)to construct such an object. The format string is passed to sprintf, along with all remaining arguments. The resulting string is what is return by the
error::what()method. Standard execptions are usually caught, and the error message return by
what()is attached to TCL's error log, and
TCL_ERRORreturn back to the interpreter.