DescentBB

I have a custom control, lets call him Jack, that is part of a dialog called Jill.

how would Jack go about sending messages to Jill?

I'm not an expert at custom controls, but I imagine you have a few options available to you. What does your control do? If it's a custom button, for instance, then it kinda makes sense to just subclass the button proc and pretend you're really just like a button. The WM_PARENTNOTIFY mechanism also comes to mind.

I guess another thing to consider is that the Treeview and Listview controls are really just custom controls that come from Microsoft. Check out their command/event API in the MSDN for some ideas.

Is this C++, VB, or .NET?

Important question: are you using MFC or plain old WinAPI?

Using WinAPI:
Get the HWND of Jack's parent using hWndJill = (HWND)(GetWindowLong(hWndJack, GWL_HWNDPARENT)); and use either PostMessage to post the message in Jill's queue and keep on moving, or SendMessage to wait until Jill is done processing Jack's message.

MehYam, WM_PARENTNOTIFY is sent by Windows to a parent window for create, destroy, and mouse-related events.

Thats what I was looking for. thanks Dcrazy.

DCrazy wrote:MehYam, WM_PARENTNOTIFY is sent by Windows to a parent window for create, destroy, and mouse-related events.

Which may be all he needs. Dunno.

BTW, there's a GetParent() you could use instead of querying the window's bytes... might be safer.