Re: CreateDialog and sending a WM_NOTIFY from it

R.Wieser wrote:

> Hello all,
>
> Maybe a bit of an esoteric problem, but one I would want to have solved
> nonetheless:
>
> I've got a program which puts up a settings dialog (using CreateDialog).
> From this settings dialog I would like to send notifications (WM_NOTIFY) to
> its parent.
>
> The problem is, the NMHDR structure expects the "idFrom" field (the control
> ID) to be filled in, and I can't find it (IDD_SETTINGS, as provided to the
> CreateDialog call) stored anywhere. :-|
>
> Question:
>
> Is it stored anywhere in the dialog, and if so, where ?
>
> Secondary question:
>
> Will using SetWindowLong with the GWL_ID argument on a Dialog window create
> any problems (does anything else use that field) ?


The WM_NOTIFY message is for a control on a dialog to send to the
dialog. Not for a dialog to send to its parent.

If your settings dialog is a control on another dialog, it must have the
styles WS_CHILD and DS_CONTROL. Only then can it have a control ID.

If your settings dialog is not a control on another dialog, you are
misusing the WM_NOTIFY message. You will be on your own.