msgs12.hlp (Topic list)
Important Notice
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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
Combination-box messages (1.2)
Notification Group  Message Groups  Overview    Up Next Previous
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CBM_HILITE         Sets drop-down button highlighting in combo box
CBM_ISLISTSHOWING  Determines if a combo-box list is showing
CBM_SHOWLIST       Shows or hides the list box in a combo box