winapi - subclassing child window c++ -


i working on windows , chose c++ language. application win32 application , not using mfc classes, native api.

my main window contain tab control in there listview control. tried subclass both control, not working though follow msdn guide.

the function used are: setwindowlong , getwindowlong changed child's procedures seems main window catches every messages controls send ( through wm_notify ) , every wm messages. thought may concern focus not have idea on how implement kind of situation: child control parent of child control.

i have created tab control in way. code:

hwndtab = createwindow(wc_tabcontrol, "",     ws_child | ws_clipsiblings | ws_visible,     0, 0, rcclient.right, rcclient.bottom,     winhandle, null, hinst, null);  oldusertabproc = (wndproc)getwindowlong(hwndtab, gwl_wndproc); setwindowlong(hwndtab, gwl_wndproc, (long_ptr)usertabproc);

here tab control procedure

lresult callback usertabproc( hwnd hwnd, uint message, wparam wparam, lparam lparam ) {   switch ( message )   {   case wm_lbuttondown:     break;   case wm_rbuttonup:     break;   case tcn_selchange:   {     usercurrenttab = tabctrl_getcursel( usertab );     break;   }   case tcn_selchanging:   {     break;   }   };    return callwindowproc( oldusertabproc, hwnd, message, wparam, lparam ); }

the listview has parent tab control.

values tcn_selchange not message types , aren't sent control themselves. notifications (the n stands "notification"). notifications sent control parent using message wm_notify or wm_command. cannot intercept them subclassing control.

if want change way parent handles notifications, need subclass parent.


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