C / C++ / MFC

9-Dec-03 1:57

Hello, i've got a problem with a Combobox as dropdown! If I have changed the Edit Control, I would paste the EnterKey! I have no reaction! How I can find the VK_RETURN ?

please help

Antti Keskinen9-Dec-03 2:39

9-Dec-03 2:39

Umm..

You have a combobox with the 'dropdown' style set. That far I understand. Beyond this sentence your description of the problem becomes simply too illogical to understand. In english: your typing sucks big time Smile | :)

Could you clarify a bit ? What is it that you are actually trying to accomplish ? Must the edit control attached to the combo box be able to handle return keypresses ?

"You cannot paste a 'EnterKey'" That makes no sense. Are you, per chance, willing to paste a string into the edit control, and this string contains a LF-CR (line feed - carriage return) pair or line change formatting ('\n') ?

The more in detail and clearly you can describe your problem, the more better we can help you. Always when posting a message, remember to check it for spelling errors or typoes. A typo can change the context of a sentence completely, making us misunderstand you completely.

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

Wholesaler9-Dec-03 2:49

9-Dec-03 2:49

Ok,
also i have a list ! Bsp: 1
3
25
76
111
546
3333
4711
Then i change manuell the entry! Bsp 56 then i hit "Enter"! -> then i want start onaccept! If then manuell entry not in List! Messagebox: Entry not in List!
else setCursel manuell entry!

.....

RChin9-Dec-03 3:09

RChin

9-Dec-03 3:09

OK I think I know what you're on about.

You can override the CBN_SELCHANGE message for your combobox using ClassWizard (VS6). This will create the OnSelChangeXXX() function handler that gets called wheneveer your user selects a new item from your combo control, or types in a new entry.
You can then use this handler to determine if the entry is already in your list, or not (Where you wanted to popup a message box).

Another way would probably be to set the CBS_DROPDOWNLIST style programatically, or via the resource editor. This will force the user to select items that are in the list instead of entering their own items.

Hope this helps.

I Dream of Absolute Zero

Wholesaler9-Dec-03 3:17

9-Dec-03 3:17

Can i open the select list when everyone change the edit control?

OnEditChange() ?

When the selectlist is open, the Enterkey is OK!

RChin9-Dec-03 3:21

RChin

9-Dec-03 3:21

Now you've lost me again! Unsure | :~

those automated translators are a b*tch aren't they?

I Dream of Absolute Zero

Antti Keskinen9-Dec-03 3:14

9-Dec-03 3:14

Referring to the MSDN, there is no prepared override which allows you to hack into the message stream of a combo box.

However, there is a way. It requires that you derive a new class from CComboBox, and put a message map entry for 'ON_WM_CHAR' messages. Route these messages to a handler function, and if the message contains the virtual key VK_RETURN, you start the copying routine.

In this routine, you first use GetWindowText to get the current text in the combo box's edit control. Then you use a combination of GetCurSel, DeleteString and InsertString methods to replace the currently selected string with the new string you typed in.

The default handler of the VK_RETURN keypress attempts to search for the inserted string in the list. You must override this handler in order to implement custom functionality. Remember to call the base class handler for other keypresses, otherwise your combo box might not work properly.

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

Wholesaler9-Dec-03 3:24

9-Dec-03 3:24

Ok I have forgotten to say, if the entry correct send a message to a server!
Update the Database about time and Date!

I have a subclass DCCombobox!

/* --------------------------------------------------------------------
* Message-Map definieren
* ------------------------------------------------------------------
*/
BEGIN_MESSAGE_MAP(DCComboBox, CComboBox)
ON_WM_KEYUP()
ON_WM_KEYDOWN()
END_MESSAGE_MAP()

int DCComboBox::OnCreate( LPCREATESTRUCT lpCreateStruct ){

return CComboBox::OnCreate(lpCreateStruct);
}

void DCComboBox::OnKeyDown(UINT nChar,UINT nRepCnt,UINT nFlags ) {
CWnd* parent = GetParent();

if( parent )
parent->PostMessage( WM_KEYDOWN,(WPARAM)nChar,
MAKELONG (nRepCnt,nFlags) );

CComboBox::OnKeyDown(nChar,nRepCnt,nFlags);
}

void DCComboBox::OnKeyUp(UINT nChar,UINT nRepCnt,UINT nFlags ) {
CWnd* parent = GetParent();

if( parent )
parent->PostMessage( WM_KEYUP, (WPARAM)nChar,
MAKELONG(nRepCnt,nFlags) );

CComboBox::OnKeyUp(nChar,nRepCnt,nFlags);
}

Antti Keskinen10-Dec-03 2:48

10-Dec-03 2:48

You're simply not making any sense. I am completely loss of what you are trying to do.

Ask a friend of yours to do an accurate translation of what you want to do and post that as a message. Otherwise we cannot help you any further, as we can't understand your motives at all.

The code you posted works correctly, as far as I can tell: it posts a message to the parent window when a keyboard event is received in the combo box control. Is this what you wanted to do ?

What is this 'send a message to server' ? What server ? Time ? Date ?? Database ??? You've completely shaken us. Start forming your problem anew, and this time ask a friend who has qualified english skills to translate it for you, so it will be easier for us to read.

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

DDE and Netscape

Monty²9-Dec-03 1:55

Monty²

9-Dec-03 1:55

i have made an app which connects to IE and Netscape via DDE and tells the currently loaded URL
it is working fine with IE but
not with Netscape
netscape connects with NSShell,NETSCAPE and NSCMDLINE
but doesn't tell the URL
which of these three should i connect too

please Help

Re: DDE and Netscape

Antti Keskinen9-Dec-03 2:59