Re: sendmessage to a modal dialog - C / C++ / MFC Discussion Boards

jhwurmbach24-Sep-02 4:02

24-Sep-02 4:02

AFAIK, deleting the function in ClassWizard deletes its message map entry.
But if you WANT to do it by hand but are afraid to confuse VisualStudio, you can always close your project and do it with an editor from 'the outside'.

Re: deleting a control from the form

Tomasz Sowinski24-Sep-02 4:10

Tomasz Sowinski

24-Sep-02 4:10

If you're using VC6, select 'OnButtonTest' function in ClassView, open context menu and select 'Delete'. This will delete OnButtonTest declaration in .h, its definition in .cpp and message map entry as well.

Tomasz Sowinski -- http://www.shooltz.com

*** Vodka. Connecting people. ***

Re: deleting a control from the form

Pavel Klocek24-Sep-02 4:10

Pavel Klocek

24-Sep-02 4:10

You can delete it manualy - delete the handler definition from h and cpp files
and also the binding from BEGIN_MESSAGE_MAP/END_MESSAGE_MAP section in cpp file (ON_BN_CLICKED).

If you don't want to edit wizard generated sections of code do (In VC6):
Go to the class wizard, make sure the dialog class is selected,
in Message Map tab see the Member function listbox.
Select your OnButton handler and push Delete function.
Note that you need to delete the implementation of the handler in cpp file manualy.

Pavel
Sonork 100.15206

sendmessage to a modal dialog

ns24-Sep-02 2:32

24-Sep-02 2:32

For a modeless launch, I get a pointer to the window, so I can senmessage it with that.

But for a modal dialog when I do

CMyDialog myDialog;

myDialog.DoModal()

and then want to send a message to myDialog, will I do this?

<code>CMyDialog* p = &myDialog;

       p->SendMessage</code>?

I'd check it out myself in code, but cant right now....

Thanks,
ns

Re: sendmessage to a modal dialog

jmkhael24-Sep-02 2:32

jmkhael

24-Sep-02 2:32

u can send a message to anything derived from CWnd using this method

If u wanna send to another dialog, u can get its a pointer from FindWindow

Papa
Murex Co.

while (TRUE)
Papa.WillLove ( Bebe ) ;

thank you!

ns24-Sep-02 2:41

24-Sep-02 2:41

I'm looking up FindWindow right now...

You cant use it to find a window in another app right? It wouldnt know the classname etc....
Thanks,
ns

Re: thank you!

jmkhael24-Sep-02 2:47

jmkhael

24-Sep-02 2:47

if u need to find a child window within a parent window u can use FindWindowEx providing the Window Handle of the CWnd named m_hWnd.

In order to know the class name u can see the output of Spy++ or do like he does! There's even an article on CP that does that!

Papa
Murex Co.

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: sendmessage to a modal dialog

Phil J Pearson24-Sep-02 6:21

Phil J Pearson

24-Sep-02 6:21

You cannot send a message from the same thread because DoModal won't return until the dialog is closed.

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Which SP do I have installed?

Anonymous24-Sep-02 2:18

Anonymous

24-Sep-02 2:18

Hi,
I have two PCs and like to see if both have same service packs installed. Where can I find this information in VC6? thanks

Re: Which SP do I have installed?

SteveKing24-Sep-02 3:46

SteveKing

24-Sep-02 3:46

have a look at the following article:
http://www.codeproject.com/macro/vsspver.asp[^]

How to open MDB file without DSN

Tili24-Sep-02 2:16

Tili

24-Sep-02 2:16

I want to use CRecordset and CDatabase classes to open MDB files without registering them on DSN. HOw can i do that and what possible compatibility issues will there be.

Confused | :confused:

In my dream, I was dorwning my §orrow§
But my §orrow§, they learned to §wim

Re: How to open MDB file without DSN

Tomasz Sowinski24-Sep-02 2:24

Tomasz Sowinski

24-Sep-02 2:24

Using CDaoRecordset isn't an option?

Tomasz Sowinski -- http://www.shooltz.com

*** Vodka. Connecting people. ***

Re: How to open MDB file without DSN

jmkhael24-Sep-02 2:29

jmkhael

24-Sep-02 2:29

http://www.codeproject.com/database/excel_odbc_write.asp

Papa
Murex Co.

while (TRUE)
Papa.WillLove ( Bebe ) ;

Unicode Controls

waterbuffalo24-Sep-02 2:13

waterbuffalo

24-Sep-02 2:13

I am finding Unicode Controls that can run on Windows 98. Help me, please.

Thanks for your help.

Re: Unicode Controls

Maximilien24-Sep-02 2:28

Maximilien

24-Sep-02 2:28

to have support for UNICODE for win98, you need to have your application use the unicows.lib

see Microsoft Layer of Unicode on Windows 95/98/Me Systems[^] @ microsoft. but if I were you, I'd think twice about it, and upgrade your OS to Xp.

Max.

when will the form disappear?

ns24-Sep-02 2:15

24-Sep-02 2:15

First, is it possible to terminate a CDialog (modeless) from the spawning class?

Second, if I am receiving repeated SendMessages from a dll, and this happens at a function call to the dll, will my dialog vanish after all the messages have been sent, or earlier? Will it wait for the dll to finish before executing the next line?

//launch modeless form
//call dll which wil send 100 sendmessages
//terminate modeless form

Third,can you sendmessage from a completely independent app, (not a dll) using the same technique as usual?

Thanks,
ns

Re: when will the form disappear?

Ravi Bhavnani24-Sep-02 6:26

Ravi Bhavnani

24-Sep-02 6:26

First, is it possible to terminate a CDialog (modeless) from the spawning class?

Yes. Add a handler for a hidden button (or menu command) in your modeless dialog, eg: CMD_HIDDEN_CLOSE, which does this:

CMyModelessDlg::OnHiddenClose()
{
  // Do any dialog specific cleanup
  ...
 
  // Close this window
  CDialog::OnOK();
  DestroyWindow();
  delete this;
}

Then, just post the modeless dialog the CMD_HIDDEN_CLOSE command, eg:

CMyModelessDlg* pModeless = ...;
pModeless->PostMessage (WM_COMMAND, CMD_HIDDEN_CLOSE);

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: when will the form disappear?

Ravi Bhavnani24-Sep-02 6:29

Ravi Bhavnani

24-Sep-02 6:29

Third,can you sendmessage from a completely independent app, (not a dll) using the same technique as usual?

Yes, as long as you have the target window's handle.

This (posting or sending messages) is an easy way to "automate" windows because they become responsive to a collection of commands. I suggest using PostMessage unless it's necessary for the command to be executed right away.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: when will the form disappear?

Ravi Bhavnani24-Sep-02 6:43

Ravi Bhavnani

24-Sep-02 6:43

Second, if I am receiving repeated SendMessages from a dll...

This is a good example of the distinction between Send/PostMessage(). Your DLL can call SendMessage() or PostMessage().

However, the termination message should be Posted, not Sended Smile | :)

in order to ensure that all previous messages are handled before the modeless dialog goes bye bye.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: when will the form disappear?

ns24-Sep-02 6:53

24-Sep-02 6:53

Thanks! I've been stuck for almost a week trying to get my VB dll to send me a message. If this doesnt look i have to do shared memory............aaaargh! It sounds horrible. Plus Ihave to do it in VB and in Vc since the two are talking.....really dont want to, but ...

Thanks,
ns

EndDialog() - can I call it in the parent form?

ns24-Sep-02 2:02

24-Sep-02 2:02

If I spawn a modal form can I terminate it from the parent like
myDialog.EndDialog(retVal);

Will retval get filled in if I send it the address of the variable?

Thanks,
ns

Re: EndDialog() - can I call it in the parent form?

Nish Nishant24-Sep-02 2:07

Nish Nishant

24-Sep-02 2:07

Yes, you can call EndDialog(nRes) anywhere in your dialog class, but remember that EndDialog will close the dialog only after the function where you call it finishes!

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Thank you, and also...

ns24-Sep-02 2:18

24-Sep-02 2:18

So this is fine, right?

CDialog myDialog;
myDialog.DoModal();
myDialog.EndDialog(& nretVal);

Thanks,
ns

Re: Thank you, and also...

Tomasz Sowinski24-Sep-02 2:23

Tomasz Sowinski

24-Sep-02 2:23

It's not - DoModal doesn't return until EndDialog is called. You'll have to call EndDialog in response to some event.

Tomasz Sowinski -- http://www.shooltz.com

*** Vodka. Connecting people. ***

Re: Thank you, and also...

Nish Nishant24-Sep-02 5:20

Nish Nishant

24-Sep-02 5:20

ns wrote:
So this is fine, right?

NO!!!

When you call DoModal a dialog is created and shown and a message loop is started. Now when you call EndDialog in one of the message handlers the dialog is destroyed, the message loop exited and then DoModal returns and the value it returns is the value you passed to EndDialog. Get it?

Regards,
Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

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