English text (or text of European languages) is usually formatted breaking it to multiple lines at word boundaries, i.e. at blanks. This (called word break) is not applicable to text of DBCS countries' languages, in which words are not separated (except Korean Hangeul).
Instead of the word break, text of Asian languages is formatted in another way called punctuation hanging (or kinsoku-shori in Japanese). Certain characters are not located at the beginning of a line and another set of characters are not located at the end of a line. For example, punctuation characters are not located at the beginning of a line. Sets of characters vary from country to country.
WinDrawText does the punctuation hanging if you set the DT_WORDBREAK flag on.
The LTEXT in dialog box also handles the punctuation hanging if you set the DT_WORDBREAK flag on.
Note: In the current DBCS OS/2, the punctuation characters are only defined by DBCS characters. For example a DBCS "." is a punctuation character, but the SBCS "." is not a punctuation character. To avoid the problem, if you prepare message text and require the punctuation handling, you should prepare the text in pure DBCS text. The punctuation of mixed SBCS and DBCS text will not be handled correctly.