How can I get text of ListCtrl in another window when I put mouse on the list?

[yhkim47]

Hi all,

I want to get text of ListCtrl in another window when I put mouse on the ListCtrl.

I got CListCtrl* but I can't get text of specified (row, col).

//
CListCtrl* pListCtrl = (CListCtrl*)WindowFromPoint(ScreenPoint);
//
LVITEM lvi;
lvi.iItem = 0;
lvi.iSubItem = 3;
lvi.pszText = szBuffer;
lvi.cchTextMax = 255;
pListCtrl->GetItem(&lvi);
//

Here, the szBuffer is empty.

Please help me.

Thanks in advance,
Kim, YoungHwan.

[VictorN]

Add this line before calling GetItem:

lvi.mask = LVIF_TEXT;

[yhkim47]

Originally posted by VictorN
Add this line before calling GetItem:

lvi.mask = LVIF_TEXT;

I did it, but the result was same.

[VictorN]

I want to get text of ListCtrl in another window when I put mouse on the ListCtrl.

Is this "another window" in the same application or in some other?

If in the same - it should work. Anyway, try to use CListCtrl::GetItemText method and look at the return value. (BTW, have you allocated the buffer for szBuffer?)

If in the other - IMHO, it is impossible.

[siawos]

originally posted by VictorN

If in the other - IMHO, it is impossible.

its not impossible if its in another process there are ways for that.

[VictorN]

Hi, siawos !

its not impossible if its in another process there are ways for that.

...using CListCtrl::GetItemText / CListCtrl::GetItem methods ?

[siawos]

originally posted by VictorN

using CListCtrl::GetItemText / CListCtrl::GetItem methods ?

yes with these calls or the calls behind these calls, i mean the messages that are sent behind these calls.
the only thing u need to cater are the process boundries for which there are several ways.

[yhkim47]

Originally posted by siawos
yes with these calls or the calls behind these calls, i mean the messages that are sent behind these calls.
the only thing u need to cater are the process boundries for which there are several ways.

Hi siawos,

I had tried sending a message to get text, but it was failed.
SendMessage() didn't work.

[yhkim47]

Originally posted by VictorN
Is this "another window" in the same application or in some other?

If in the same - it should work. Anyway, try to use CListCtrl::GetItemText method and look at the return value. (BTW, have you allocated the buffer for szBuffer?)

If in the other - IMHO, it is impossible.

I meant it is of different application.

By the way, I can get selected item count but can't for texts.
Is there any differences between them?

[kirants]

if it is a different app, you need to hook into that.
There are ways to do it.

The reason why it works for count is the count is the return value of SendMessage(LVM_GETITEMCOUNT).

However, for getting the text, you pass a buffer, which is not a valid address in another process space ( exception being WM_GETTEXT across processes, which is handled differently ).

This article would probaly help

[yhkim47]

Originally posted by kirants
if it is a different app, you need to hook into that.
There are ways to do it.

The reason why it works for count is the count is the return value of SendMessage(LVM_GETITEMCOUNT).

However, for getting the text, you pass a buffer, which is not a valid address in another process space ( exception being WM_GETTEXT across processes, which is handled differently ).

This article would probaly help

I appreciate your reply very much, and I understand your explanations. BTW here, let me ask one more.
I could get edit controls' text of another process's window with sendmessage(WM_GETTEXT). Is this different form ListCtrl?

Thanks.

[kirants]

Originally posted by yhkim47
I could get edit controls' text of another process's window with sendmessage(WM_GETTEXT). Is this different form ListCtrl?

Yes. And I guess I did mention that as an exception.

[yhkim47]

Originally posted by kirants
Yes. And I guess I did mention that as an exception.

Oops, sorry I missed it.
Thanks anyway, and I'll read the article you suggested.

Thanks again.

[siawos]

posted by yhkim47

I could get edit controls' text of another process's window with sendmessage(WM_GETTEXT).

using sendmessage across process can cause blocking, for that u can either use PostMessage() or sendmessageTimeOut(), they dont cause blocking, and of these two SendMessageTimeOut() is a better option as long as the messages are not related to keyboard or mouse because they are normally posted.

theres another way besides those "three ways" check this article as well