C14Z_MESSAGES_SHOW_AS_POPUP: Display SAP messages in a popup with message type
In order to display the popup messages along with message type, use function module C14Z_MESSAGES_SHOW_AS_POPUP.
popup
Display checkbox in ABAP F4 help using ALV
FM REUSE_ALV_POPUP_TO_SELECT can be used to display checkboxes in F4 help to allow the user to select multiple entries
ALV in Dialog Box or Popup Window
You can display ALV in dialog box or popup window using function module REUSE_ALV_GRID_DISPLAY