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Grabbing highlighted nickname from Yahoo Chat window list

I'm writing some DELPHI 7 utilities for use with Yahoo Chat.  Sending output from my program into the Yahoo Chat window was tricky but rather painless.  However, I would now like to be able to grab the currently highlighted nickname from the room participant list for use in my program output.  Every version of SendMessage() using GETTEXT has failed when send to that nickname list window and I stumped.  Any solution?
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ronlinran
Asked:
ronlinran
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2 Solutions
 
ccrdudeCommented:
I don't know the Yahoo Chat... but have you already tried the GetWindowText API function?

function MyGetWindowText(h: THandle): string;
var len: integer;
    pc: PChar;
begin
   len := GetWindowTextLength(h);
   GetMem(pc,len);
   GetWindowText(h,pc,len);
   Result := pc;
   FreeMem(pc,len);
end;

If I guess correctly from your text that you already have the handle of the control you want to get the text from, this should do.
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ronlinranAuthor Commented:
Okay, like I said, this problem has me compltetly puzzled.  I used the code provided by ccrdude but to no avail.  Sorry.

I have the handle of the chat room window using a call to findwindow using the 'imclass'.  Using Windowse spy program though I find that the class name of the nickname list is 'SysListView32'.  Using findwindowex with the 'imclass' window and then hooking to the 'SysListView32' window and then using the above code only returns 'List2' as the text not the actual text of the highlighted nickname in the list.  Hope that makes sense.

Anyway, thanks for trying
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DaFoxCommented:
Hi ronlinran,

I never used Yahoo Chat. So I don't know how the windows look like...
But this
CurrentTVItem := SendMessage(hTreeViewWnd, TVM_GETNEXTITEM, TVGN_CARET, 0);
should work as long as you are in the address space of the target app (Yahoo).

Regards,
Markus
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ronlinranAuthor Commented:
Nope, still no dice.  I"m about ready to give up on this even though I know it CAN be done.
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ccrdudeCommented:
I guess "List" is the name of the control, not the contents. GetText would work for listboxes, but I'm not sure about ListViews.

My idea: get the window handle.
Then do EnumChildWindows.
Print out GetClassName and GetWindowText for each handle that EnumChildWindows returns.
That way you should be able to find the correct classname of the control you're looking for.
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ronlinranAuthor Commented:
Thanks for all the help to date.  The control I am trying to access the highlighted text from is indeed a ListView and that seems to be the tricky bit.  The windows API isn't someting I'm very experienced with so grabbing the currently highlighted text from the control is proving porblematic at best.  The handle to the control is something I have, just what to do with it beyond that to get the info I want is the problem.
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