HOWTO: Determine Selected Items in a Multiselection List Box

• Microsoft Win32 Application Programming Interface (API), included with:
  • Microsoft Windows NT 3.51
  • Microsoft Windows 95
  • Microsoft Windows 98

SUMMARY

To obtain the indexes of all the selected items in a multiselection list box, the LB_GETSELITEMS message should be sent to the list box.

The message LB_GETCURSEL cannot be used for this purpose because it is designed for use in single-selection list boxes.

Another approach is to send one LB_GETSEL message for every item of the multiselection list box to get its selection state. If the item is selected, LB_GETSEL returns a positive number. The indexes can be built into an array of selected items.

Keywords          : kbCtrl kbListBox kbNTOS351 kbGrpUser kbWinOS95 kbWinOS98 
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Issue type        : kbhowto 

Last Reviewed: March 6, 1999