Difference Between MsgGet, MessageBox, & MsgGetText PeopleCode Functions

Wondering why there are 3 different functions or ways to get text
from a message catalog? Check the comparison below and decide which one
best fits your needs.

MsgGet(message_set, message_num, default_msg_txt [, paramlist])
The MsgGet function
retrieves a message from the PeopleCode Message Catalog and substitutes
in the values of the parameters into the text message.
Example: &MsgText = MsgGet(40000, 2, "Message not found");

MessageBox
retrieves messages from the Message Catalog but provides the
flexibility to change the severity of a message through the Message
Catalog, without modifying PeopleCode.
MessageBox(style, title, message_set, message_num, default_txt [, paramlist])
Example: MessageBox(0, "", 40000, 1, "Message not found", BUS_EXPENSE_PER.EMPLID, BUS_EXPENSE_PER.EXPENSE_PERIOD_DT);

MsgGetText is very similar to MsgGet except the message set and message number will not appear after the text of the message.

MsgGetText(message_set, message_num, default_msg_txt [, paramlist])
Example: &MsgText = MsgGetText(40000, 2, "Message not found");