On Monday, December 9, 2013 at 4:29:50 PM UTC-5, Marcel Müller wrote:

I have a listbox with style LS_MULTISEL|LS_EXTENDEDSEL and get a
WM_CONTROL message with LN_SELECT. How do I examine what item recently
has been selected or deselected? The documentation says one should use LM_QUERYSELECTION, but this does not reflect the recent changes.

Marcel

I know that this is a very old question but I wanted to give a straight answer since one was not posted and someone might come looking for an answer...

You need to start by defining a select index, it needs to be signed...

SHORT sSelectIndex;

To find the first item selected you need to set sSelectIndex to return the first item selected...

sSelectIndex = LIT_FIRST;

Then you loop through the lmquery until sSelectIndex is equal LIT_NONE...

while ((sSelectIndex = (USHORT)(ULONG)WinSendMsg(hWndLstBox,
LM_QUERYSELECTION, MPFROMSHORT((SHORT)sSelectIndex), 0L)) != LIT_NONE)
{
CHAR szText[256];
// query list box item for text
WinSendMsg(hWndLstBox,
LM_QUERYITEMTEXT, MPFROM2SHORT(sSelectIndex, sizeof(szText)),
MPFROMP(szText));
printf(szText);

}

I hope someone finds this answer.

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