LB_SETTABSTOPS

An application sends an LB_SETTABSTOPS message to set the tab-stop positions in a list box.

LB_SETTABSTOPS 
wParam = (WPARAM) cTabs;            // number of tab stops 
lParam = (LPARAM) (LPINT) lpnTabs;  // address of tab-stop array 
 

Parameters

cTabs

Value of wParam. Specifies the number of tab stops in the list box.

lpnTabs

Value of lParam. Pointer to the first member of an array of integers containing the tab stops, in dialog template units. The tab stops must be sorted in ascending order; backward tabs are not allowed.

Return Values

If all the specified tabs are set, the return value is TRUE; otherwise, it is FALSE.

Remarks

To respond to the LB_SETTABSTOPS message, the list box must have been created with the LBS_USETABSTOPS style.

If cTabs parameter is 0 and lpnTabs is NULL, the default tab stop is two dialog template units. If cTabs is 1, the list box will have tab stops separated by the distance specified by lpnTabs.

If lpnTabs points to more than a single value, a tab stop will be set for each value in lpnTabs, up to the number specified by cTabs.

The values specified by the lpnTabs parameter are in dialog template units, which are the device-independent units used in dialog box templates. To convert measurements from dialog template units to screen units (pixels), use the MapDialogRect function.

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

List Boxes Overview, List Box Messages, MapDialogRect