Hi there, try this example

Code
dialog new_table {
  title "New Project"
  size -1 -1 251 161
  option dbu
  ; "text", id, x y w h, style  (left, push, 3state)
  check "Check Box", 1, 8 15 50 10
  check "Check Box", 2, 8 35 50 10, 3state
  check "Check Box", 3, 8 55 50 10, left
  check "Check Box", 4, 8 75 50 10, push
}

If you omit the style it will default the checkbox on the left and text on the right. Same with the 3state.