rebol - view with drop-down howto -

for view, need define size, drop-down data, set size , chosen value input in function.

loadgui: func [] [     unview/all      view layout [         dropd_urls: drop-down (geturlsend urls)   ] ] 

what logic behind style or facet? define word, facet size, alignment , other properties, block on-action? , (geturlsend urls) gets evaluated, should placed? if provide thorough example on drop-down, great.

and question. i'm aware of help system/..., cannot useful information logic of how accomplish stated above. go know how build view constructs? howto? normally, read howtos provided nick antonnacio, there's more view shown in documents.

the demo on atronixengineering.com/r3/demo.r has dropdown list under widgets. generate dropdown list compose/deep.

view layout compose/deep [     dropd_urls: drop-down  [        (geturlsend urls)      ] ] 

or different actions depending of choice of dropdown list

view layout [    dropd_urls: drop-down  [      "1"      "2"   ] on-action [print face/facets/text] ] 

did read cross platform app development rebol 3 saphir ?