LB_SETTABSTOPS Overview  Group

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. Points 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.

See Also

MapDialogRect