From: Maxim Ap <maxbc@...>
Date: 2009-12-25T06:28:49+09:00
Subject: Call SendMessage WinAPI to get item_rect for tree control

Hi everyone!

I am trying to write lib for windows application GUI testing.The problem
that I see now it is how to call SendMessage WinAPI for tree control to
get tree item rect.Code  Commctrl.h for this looks like:

#define TVM_GETITEMRECT         (TV_FIRST + 4)
#define TreeView_GetItemRect(hwnd, hitem, prc, code) \
    (*(HTREEITEM *)prc = (hitem), (BOOL)SNDMSG((hwnd), TVM_GETITEMRECT,
(WPARAM)(code), (LPARAM)(RECT *)(prc)))

And I don't know what is *(HTREEITEM *)prc = (hitem) and how to do this
on Ruby.

For example my Ruby code for GetRoot looks like:

def send_message(hwnd,msg,wParam,lParam )
  send_message = user32 'SendMessage' , ['L' , 'L' , 'L' , 'P' ], 'L'
  send_message.call hwnd, msg, wParam, lParam
end

def get_tree_root_item(htree)
  send_message(htree,0x1100+10,TVGN_ROOT,0 )
end

and this works for me.

Commctrl.h for this looks:
#define TreeView_GetRoot(hwnd)   TreeView_GetNextItem(hwnd, NULL,
TVGN_ROOT)

#define TVM_GETNEXTITEM         (TV_FIRST + 10)
#define TreeView_GetNextItem(hwnd, hitem, code) \
    (HTREEITEM)SNDMSG((hwnd), TVM_GETNEXTITEM, (WPARAM)(code),
(LPARAM)(HTREEITEM)(hitem))

It would be greate if someone can explain what is *(HTREEITEM *)prc =
(hitem) and how to do this in Ruby.

Thanks,
Maxim
-- 
Posted via http://www.ruby-forum.com/.