Problem with ListView API : LVM_ISERTITEM

[Andrew Quinn AUS]

Hi, Are you sure that lParam is pointing to a valid LV_ITEM structure? Cheers, Andy

[ravjak]

I'm pretty sure because listview is a HWND of list control and its valid Pain is a weakness living the body

[bikram singh]

Check that mask member contains LVIF_TEXT This flag indicates that the pszText member contains a valid address. If the flag is not set, the member could contain any "address". Also, check that cchTextMax member is not zero. (not really required) Bikram Singh

[ravjak]

this pice of code doesn't work :( case LVM_INSERTITEM: { LV_ITEM FAR* pitem = (LV_ITEM FAR*) lParam; if(!pitem && !pitem->pszText) break; if( pitem->mask & LVIF_TEXT == LVIF_TEXT && pitem->cchTextMax>0) { MessageBox(okno,pitem->pszText,":-)",MB_OK); } break; any other ideas :confused: :mad::mad: Pain is a weakness living the body

[bikram singh]

Try using brackets to delimit each expression you are testing in the if statement. Bikram Singh

[jmkhael]

What happens if pitem != NULL and pitem->pszText = NULL? (Hint: It wont break) I would do the test: if(pitem && pitem->pszText) { // Do the dance... } Papa while (TRUE) Papa.WillLove ( Bebe ) ;

[ravjak]

Not working hmmm hardcore hehe. Im testing changing iImage value according to iItem and it seems to be good if I know sequence of adding apriori, which will require some more coding. Anyway its really strage stuff isn't it :confused: Pain is a weakness living the body

[jmkhael]

Try this case LVM_INSERTITEM: { LPLVITEM pitem = (LPLVITEM) lParam; if(pitem && pitem->pszText) { if( ((pitem->mask & LVIF_TEXT) == LVIF_TEXT)) { MessageBox(okno,pitem->pszText,"",MB_OK); } } break; Papa while (TRUE) Papa.WillLove ( Bebe ) ;

[ravjak]

Not working. Plese remind me next time do not take a project for windows. Pain is a weakness living the body

[ravjak]

But I thing I know why is it so. According to spy ++ this is a ATL:SysTreeView control. Maybe as a lparam they are sending some other struct than LV_ITEM:confused: Pain is a weakness living the body

[jmkhael]

Where is it crashing? Papa while (TRUE) Papa.WillLove ( Bebe ) ;

[bikram singh]

I would do: if(pitem) { if(pitem->pszText) { // Do the dance... } } Bikram Singh

[ravjak]

Im hooking into OE and it crashes when OE adds new items to address list. when i use olny iImage eg iImage = 2 it works properly but i want test pszText vaule and according to this set proper valus of iImage :) Pain is a weakness living the body

[ravjak]

not working too i think this not valid pointer beacuse its not the same address space I had the similar problem some time ago when i wannted to send some char * as wparam or lparam using SendMessage. I had to use WM_COPYDATA then char * goes thru kernel memory and pointer is valid:confused: Pain is a weakness living the body