WinDeleteLboxItem
This macro deletes the indexed item from the List Box. It returns the number of items left.
Syntax
WinDeleteLboxItem(hwndLbox, index)
Parameters
- hwndLbox (HWND) - input
- Listbox handle.
- index (LONG) - input
- Index of the listbox item.
Returns
- lItems (LONG) - returns
- Number of items left.
Remarks
This macro is defined as:
#define WinDeleteLboxItem(hwndLbox, index) \
((LONG)WinSendMsg(hwndLbox, \
LM_DELETEITEM, \
MPFROMLONG(index), \
(MPARAM)NULL))
This macro requires the existence of a message queue.
Example Code
This example responds to an item in the list box being selected (LN_SELECT, WM_CONTROL message) by deleting the selected item using WinDeleteLboxItem.
#define INCL_WINWINDOWMGR /* Window Manager Functions */
#define INCL_WINLISTBOXES /* Window List Box definitions */
#include <os2.h>
LONG lIndex; /* selected item index */
LONG lLeft; /* items left after delete */
HWND hwndLbox; /* list box window handle */
MPARAM mpParam1; /* Parameter 1 (rectl structure) */
MPARAM mpParam2; /* Parameter 2 (frame boolean) */
case WM_CONTROL:
/* switch on control code */
switch(SHORT2FROMMP(mpParam1))
{
case LN_SELECT:
hwndLbox = HWNDFROMMP(mpParam2);
/* query index of selected item */
lIndex = WinQueryLboxSelectedItem(hwndLbox);
/* delete selected listbox item */
lLeft = WinDeleteLboxItem(hwndLbox, lIndex);
break;
}