Re: deleting a control from the form - C / C++ / MFC Discussion Boards

Error when use IDiskQuotaControl->FindUserName etc.?

Anonymous24-Sep-02 3:38

24-Sep-02 3:38

Hi all,
I use IDiskQuotaControl->FindUserName() and IDiskQuotaControl->AddUserName() to add quota entry to a network shared volume for every user.
But There are miss match of the function parameters between the Visual studio promotion and the search result of F1 help.
The Visual studio promotion after I type the funciton name and the "(" is:
///////////
HRESULT FindUserName(LPCWSTR pszDomain,
LPCWSTR pszName, PDISKQUOTA_USER **ppUser);

/////////
but when I search use F1 help:
the result is:
///////////////
HRESULT FindUserName(
LPCWSTR pszLogonName,
PDISKQUOTA_USER *ppUser
);

Then I tried the first function. compile and link ok but when execute to it, a Debug Error! occurce:
/**************
Debug Error!
Program: ***
Module:
FIle:i386\chkesp.c
Line: 42

The value of ESP was not properly saved across a funciton call. This is usually a result of calling a function declared with one calling convention with a funciton pointer declared with a different calling convention.
***************************
I suspect that the error was caused by the reson that there are two functions one is we used and can compile and link but the real function in some dll is the other one.
But when I use the second one in code, it can not be compiled. say the this funciton does not take two parameters.
And the same situation with the AddUserName()

Does any one know how to sovle this problem?

Thanks very much for your help.

Laura.
Bu

annoying carchive problem

carrie24-Sep-02 3:16

carrie

24-Sep-02 3:16

This is a general problem for me that I've still not worked out properly even though I've been hitting it for the last couple of years. Reading files with CArchives I can never stop them reading too much of the file and causing a GPF. An example for just now would be I'm using CSockets, so I've got a CSocketFile and a CArchive object as well. I'm using it as part of an ftp client and at the moment its at the point of logging in to the ftp server. There is a big(20 line) welcome message on the server so I need to read this data from the CArchive. When I do a straight

archivein >> stringtxt;

I only get the first 3 lines of the welcome message. When I try

while(!archivein.IsBufferEmpty())
{
blah;
}

I get that the buffer is always empty so it never goes into the loop. As a last resort I tried changing it to make sure it looped.

while(archivein.IsBufferEmpty())
{
blah;
}
I know that code is wrong but it got into hte loop at least but obviously it went into an infinite loop so it was useless.

I tried using archivein.ReadString() but this always causes GPFs. A basic example is.
while(receivedFromServer = archivein.ReadString(buffer,100))
{
blah;
if(receivedFromServer == "")
return;
}

but that just totally craps out on me Frown | :(

Any hints on generally dealing with CArchives, using CArchives with CSockets or with reading files in general.

thanks for reading the most obscure and confused question ever Smile | :)

deleting a control from the form

ns24-Sep-02 3:14

24-Sep-02 3:14

If I have a button, and made an OnButton function for it by dbl clicking the button in design view, and then I want to delete it what all needs to go in the code? I see thats theres reference to it in the gray regions of the code(message maps etc), and one time I deleted something from the gray area and the app got destroyed. So do we or do we not delete stuff from the 'gray'areas?

Thanks,
ns

Re: deleting a control from the form

jmkhael24-Sep-02 3:15

jmkhael

24-Sep-02 3:15

u do, if u attached a member variable to it, search for all the occurence of it and kiss her goodbye!

Papa
Murex Co.

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: deleting a control from the form

ns24-Sep-02 3:47

24-Sep-02 3:47

So the following is not a cause for concern? I am free to go and comment out lines in the gray areas? I tried it on a very simple app and it seems to work, but I am afraid to try it on my mainproject.

BEGIN_MESSAGE_MAP(CEnchangeView, CFormView)
	//{{AFX_MSG_MAP(CEnchangeView)
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_EN_CHANGE(IDC_EDIT1, OnChangeEdit1)
	ON_BN_CLICKED(IDC_BUTTON4, OnButton4)
<code>//	ON_BN_CLICKED(IDC_BUTTONTEST, OnButtontest)</code>
	ON_BN_CLICKED(IDC_BUTTON5, OnButton5)
	//}}AFX_MSG_MAP

Thanks,
ns

Re: deleting a control from the form

jhwurmbach24-Sep-02 4:02

jhwurmbach

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.

The opinions expressed in this communication do not necessarily represent those of the author (especially if you find them impolite, discourteous or inflammatory).

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

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.