msos2.hlp (Table of Contents; Topic list)
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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
LS_MULTIPLESEL
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LS_MULTIPLESEL  Causes the string in a list-box item to be alternately
selected and not selected each time the user selects the list-box item. The
user can select any number of strings.
 
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