newblock {name {}} {x {0}} {y {0}} {w {50}} {h {50}} {pinsin {in1 in2}} {pinsout {}} {moretags {}}
creates a new generic block, without any default functionality ascribed
to it. There is no name.bfunc variable content made, to give the
block a function.
newproc {f {}} {name {}} {in {in}} {out {out}} {width {40}} {height {}} {tags {}} {x {10}} {y {10}}
This is the easiest way to make a function, for instance
'newproc { set add1.out [expr ${add1.in}+1] } add1'
to make a block add one to its input value.
newimage {file}
reads the image from disk, creates a block with the size of the
image having 1 in and 1 output, and initializes the function of the
block as a simple transfer from in to out.
newtext {width {60}} {height {40}} {tags {}} {name {}}
makes a bit bigger block with rom for text. It displays the plain text
at its input.
newentry
Creates an entry on the canvas, where the cursor can be put in to enter
an expression that is output when return is pressed. An event is
generated by pressing return that 'runs' the coupled network.