createChbChb: creates a two column check box on the main screen
createChbChb(ind, elements, prefix1 = NULL, prefix2 = NULL, envir = KTSEnv)
Number of rows of the check box
Row labels
A prefix to assign a name to the output variables (column 1)
A prefix to assign a name to the output variables (column 2)
Enviroment to which the output variables will be assigned
An output variable for each box. They are be passed to the corresponding onOk function