ListView Control

I was using ListView_GetCheckState to see if an item is checked, but there isn't a ListView_SetCheckState and I can't seem to find any other message to do it. Do anyone know if there is a message to set the check mark checked without user input?

Thanks

Quote:

---

Originally Posted by KonArtis

but there isn't a ListView_SetCheckState

---

Actually there is, and it works fine for me:
http://msdn.microsoft.com/library/de...checkstate.asp
You can also send LVM_SETITEMSTATE with the right LVITEM struct values to do the same thing.

I tried the ListView_SetCheckState macro but it gives me an error. And for the LVM_SETITEMSTATE message, I'm not sure how to set the check state in the LVITEM struct. Could be a little more detailed?

Thanks.

ListView_SetItemState may also be of some interest.

>>but it gives me an error<<

Help us to help you by telling us what the error is.

The error for ListView_SetCheckState is that is doesn't exist.

Have you #defined _WIN32_IE? Check out your commctrl.h header file for details of ListView_SetCheckState use; I think it just calls ListView_SetItemState anyway.

If I use ListView_SetItemState, I'm not sure what to set with the LVITEM object. Can you help?

Thanks.

This is what ListView_SetCheckState is defined as in WIN.H here:

Code:

---

#define ListView_SetCheckState(h,i,f) ListView_SetItemState(h,i,INDEXTOSTATEIMAGEMASK((f)?2:1),LVIS_STATEIMAGEMASK)

---

You could try adding that to win.h or just using SetItemState yourself, replacing h, i and f.
h = ListView Handle
i = Item Number
f = True/False

win.h is specific to lcc-win32 and I suspect the OP may be using a not too up to date version of mingw, specifically commctrl.h. :)

But SnarlingSheep's advice is good: you can see from the macro definition the required parameters. For an explanation of where the '1' and '2' come from read the comments for LVS_EX_CHECKBOXES and the remarks under ListView_SetItemState.

For completeness:

Code:

---

ListView_SetItemState(hListview, index, INDEXTOSTATEIMAGEMASK(1), LVIS_STATEIMAGEMASK); /*unchecked */
ListView_SetItemState(hListview, index, INDEXTOSTATEIMAGEMASK(2), LVIS_STATEIMAGEMASK); /*checked */

---