The following table shows the combination-box styles:
旼컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿞tyle Name 쿏escription � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿎BS_SIMPLE 쿎reates a simple combination box that � � 쿪lways displays its list box. The user � � 쿬an enter and edit text in the entry � � 쿯ield or choose items from the list box.� 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿎BS_DROPDOWN 쿎reates a drop-down combination box that� � 쿭isplays its list box only if the user � � 쿬licks the drop-down icon at the right � � 쿮nd of the entry field. The � � 쿬ombination-box control hides the list � � 쿫ox when the user clicks the icon a � � 퀂econd time. In a drop-down combination � � 쿫ox, the user can enter and edit text in� � 퀃he entry field or choose items from the� � 쿹ist box. � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿎BS_DROPDOWNLIST 쿎reates a drop-down-list combination box� � 퀃hat is similar to the drop-down � � 쿬ombination box, except that the user � � 쿬an choose items only from the list box.� � 쿟he user cannot enter or edit text in � � 퀃he entry field. � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴�
For combination boxes that have the CBS_DROPDOWN or CBS_DROPDOWNLIST styles, an application can display the list by using the CBM_SHOWLIST message.
An application can determine whether the list is already showing by using the CBM_ISLISTSHOWING message.
Applications also can use any of the entry-field (EM_) and list-box (LM_) messages with combination boxes. Entry-field messages affect the entry field; list-box messages affect the list box. For example, an application can use the LM_INSERTITEM message to insert items into the list box.