CB_SHOWDROPDOWN

An application sends a CB_SHOWDROPDOWN message to show or hide the list box of a combo box that has the CBS_DROPDOWN or CBS_DROPDOWNLIST style.

CB_SHOWDROPDOWN 
wParam = (WPARAM) (BOOL) fShow;     // the show/hide flag 
lParam = 0;                         // not used; must be zero 
 

Parameters

fShow

Value of wParam. Specifies whether the drop-down list box is to be shown or hidden. A value of TRUE shows the list box; a value of FALSE hides it.

Return Values

The return value is always TRUE.

Remarks

This message has no effect on a combo box created with the CBS_SIMPLE style.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Requires version 1.0 or later.
  Header: Declared in winuser.h.

See Also

Combo Boxes Overview, Combo Box Messages, CB_GETDROPPEDSTATE