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From: Gorlash on 28 Jan 2010 16:42
I have a property sheet with two tabs on it. I have a default button
on each sheet, and it works properly. I have an edit control that I
type text into, and pressing <Enter> presses the "Send Command"
button. If I type into the edit control, then TAB over to the "Send
Command" button, <Enter> still works properly.

However, if I close one tab of the property sheet, then on the other
tab the default action is completely lost!! I can still *click* the
"Send Command" button and it works, but <Enter> just does nothing.

I added some debug code to dump Windows Message, and here's what I
see:

// before Close Port, <Enter> generates:
CPort SubClass: [DM_GETDEFID]
WM_COMMAND [CP]: command=BN_CLICKED, target=IDC_BTN_SEND
CPort: [WM_ERASEBKGND]
CPort: [WM_CTLCOLORDLG]
WM_COMMAND [CP input]: command=10
WM_COMMAND [CP input]: command=4
WM_COMMAND [CP input]: command=3
CPort: [WM_PAINT]
Cport WM_NOTIFY: [-113] LVN_ODCACHEHINT

// after Close Port
CPort SubClass: [DM_GETDEFID]
Cport WM_NOTIFY: [-113] LVN_ODCACHEHINT

So, DM_GETDEFID *is* getting called on <Enter>, but somehow the
connection to the default button has been lost, so
WM_COMMAND:BN_CLICKED is never generated. I tried fixing this (both
in PSN_SETACTIVE, and in a separate debug function) with either:
SendMessage(hwnd, DM_SETDEFID, IDC_BTN_SEND, 0 );
or:
SendMessage(GetDlgItem(hwnd, IDC_BTN_SEND), BM_SETSTYLE,
BS_DEFPUSHBUTTON, TRUE);
but neither of these fix the problem (though they *are* getting
executed).

What am I missing here??




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