How to send a NM_CLICK message to listctrl

Question

4.00/5 (1 vote)

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How do i send a WM_CLICK message to a listctrl?
I am trying to do it as follows, but this doesn't work.

C++

NMHDR hdr;
hdr.hwndFrom = this->m_hWnd;
hdr.code = NM_CLICK;
hdr.idFrom = ??;
m_List1.SendMessage(WM_NOTIFY, 0, (LPARAM)

I also tried like this

C++

m_List1.SendMessage(NM_CLICK,0,0);

I want first Item get clicked of list ctrl automatically.
The functionality is such that List of second list control gets filled up by pressing
item of first list control.And requirement is such that ,first item of first Listcotrol gets clicked automatically.

Extra information:
There is one list control in which patient names are displayed,after clicking particular patient details of that patient are filled up in second list box.
now requirement is such that as soon as dialog is displayed (list control gets filled up) first patient gets clicked and details get filled.

Also there are different search criterias so the patient is not fixed.

Posted 8-Aug-12 1:55am

adityarao31

Updated 8-Aug-12 3:26am

Joan M

v5

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Comments

Richard MacCutchan 8-Aug-12 8:04am

NM_CLICK is a notification message sent from a list control to its parent window.

Try giving a bit more information on what problem you are trying to solve.

Kenneth Haugland 8-Aug-12 8:13am

Please dont shout!! Remove the caps lock!

[no name] 8-Aug-12 8:23am

Screaming at people is pretty much a sure fire way to get ignored.

Prasad_Kulkarni 8-Aug-12 8:46am

Be courteous and DON'T SHOUT.

Everyone here helps because they enjoy helping others, not because it's their job.

Using all capitals means SHOUTING on web, and using all small letters means childish. Always use proper capitalization.

Remove shouting.

adityarao31 8-Aug-12 10:30am

Thank you very much for telling me that I was totally unaware of the fact

Joan M 8-Aug-12 9:25am

Apart of the fact that shouting is not polite, you should add this information to your question...

Richard MacCutchan 8-Aug-12 9:55am

How do you know which patient is first?

adityarao31 8-Aug-12 10:33am

That can be known only runtime

Richard MacCutchan 8-Aug-12 10:57am

So how do you figure out which patient to select at the beginning as you describe above?

adityarao31 8-Aug-12 11:53am

Thats what by default click must be on first patient

Richard MacCutchan 8-Aug-12 12:06pm

You are going round in circles here.

NM_CLICK is a notification message which is sent from the CListCtrl to its parent window when an item is clicked. Sending this message to the CListCtrl serves no purpose.

Secondly, you say that you want to click on the first patient when the CListCtrl is created, but then you say you don't know which item this will be.

adityarao31 8-Aug-12 12:28pm

There is some twist in the story,there are some other search buttons on the dialog which if pressed by user they update list in first list cintrol.so there is also requirement that every time list in first list control is updated by default first item must get clicked.

Richard MacCutchan 8-Aug-12 12:41pm

So, when the list has been updated you need to get the item at index zero, and use its details to populate list 2. Spend some time looking at the CListCtrl::GetItem() documentation for help.

adityarao31 8-Aug-12 12:47pm

Yah your solution is good but it will be very painfull because same listcontrol is used for multiple purposes,also it is requirement put forwarded that, for user, to understand that which patient details are these first item must be looked as selected

Richard MacCutchan 8-Aug-12 13:08pm

Then use the SetItemState() function. You really need to make use of the documentation, it's there to help you.

adityarao31 8-Aug-12 13:15pm

Thanks for your help, tomorrow i will try this approach good night

adityarao31 9-Aug-12 1:52am

This approach worked in this case,But is there any way to send a click on particular item of List Control.

Joan M 8-Aug-12 9:28am

Shouldn't you put the code that react to the click on the first item inside a function and call that code from two places?

1. in the click event handler.
2. in the initdialog (or similar).

adityarao31 8-Aug-12 10:27am

i am very sorry for capital letters

Joan M 8-Aug-12 10:30am

Don't worry ;)

adityarao31 8-Aug-12 12:37pm

See i want to click listctrl programatically instead of user.

Joan M 8-Aug-12 16:29pm

yes, to get something done, let's call it "A". if you put "A" inside a routine, and in the handler of the user click in the listctrl you call "A", and you also call "A" when loading your form... job done... but it is up to you.

adityarao31 8-Aug-12 23:31pm

There is some twist in the story,there are some other search buttons on the dialog which if pressed by user they update list in first list cintrol.so there is also requirement that every time list in first list control is updated by default first item must get clicked.

Joan M 9-Aug-12 1:56am

Yes, ok, but if I understand you well, you handle the "human" click correctly, what you are not capable to handle is the automatic click... if that is the case you can do what I suggest. If this is not the case I've not understood you and you should forget this set of posts.

adityarao31 9-Aug-12 2:29am

Yes I am not capable to handle automatic click

Joan M 9-Aug-12 2:56am

OK, so you have programmed a specific behavior for the click, and when a human clicks the listctrl it works OK.
What I would do in your case is to encapsulate that behavior inside a function "fxWhatItsDoneWhenTheUserClicks()", then when you have to process the automatic click you would not need to simulate a virtual click, you would only need to call that function. The virtual click, if I understood you, is only to execute what would be inside "fxWhatItsDoneWhenTheUserClicks()" so you could simply call that function and the job would be done.

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