C / C++ / MFC Discussion Boards

Re: Asynchronous CInternetSession object

Ravi Bhavnani1-Aug-02 10:58

Ravi Bhavnani

1-Aug-02 10:58

This[^] is the query similar to yours. I wish MS would fix their online docs. Frown | :(

/ravi

Let's put "civil" back into "civilization"
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Re: Asynchronous CInternetSession object

LukeyBoy1-Aug-02 11:07

LukeyBoy

1-Aug-02 11:07

Still no go. Now I get an assert error in inet.cpp, 645 (when I enable the callback). The line is:

ASSERT(!m_bCallbackEnabled);

Re: Asynchronous CInternetSession object

Ravi Bhavnani1-Aug-02 11:11

Ravi Bhavnani

1-Aug-02 11:11

Ugh. I'm going to dig some more...

/ravi

Let's put "civil" back into "civilization"
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Alternate approach

Ravi Bhavnani1-Aug-02 11:13

Ravi Bhavnani

1-Aug-02 11:13

Here's[^] an alternate approach. I'm still looking for the fix...

/ravi

Let's put "civil" back into "civilization"
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ravib@ravib.com

Asynch not supported in MFC >= 4.22

Ravi Bhavnani1-Aug-02 11:16

Ravi Bhavnani

1-Aug-02 11:16

Apparently asynch support in CInternetSession has gone away. Confused | :confused:

See this MSDN link[^].

/ravi

Let's put "civil" back into "civilization"
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One more...

Ravi Bhavnani1-Aug-02 11:22

Ravi Bhavnani

1-Aug-02 11:22

Humor me one more time. Smile | :)

Can you try this:

CMyInternetSession::CMyInternetSession()
  : CInternetSession
     ("FooBar", 1, INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0)
{
  EnableStatusCallback (TRUE);
}

/ravi

Let's put "civil" back into "civilization"
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Works!

Ravi Bhavnani1-Aug-02 11:23

Ravi Bhavnani

1-Aug-02 11:23

Seems to work for me! My callback gets called.

/ravi

Let's put "civil" back into "civilization"
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ravib@ravib.com

Re: One more...

LukeyBoy1-Aug-02 12:19

LukeyBoy

1-Aug-02 12:19

You're gonna hate me... but it still doesn't work Frown | :-(

. Several callback events get fired correctly, but then an assertion fails again that looks like:

ASSERT(m_bCallbackEnabled != NULL);

And the bigger problem is that the call now isn't asynchronous - it blocks the whole process until the callback events. Ouch. If I can't figure this out I'm never gonna touch MSVC again!!! Just kidding.

Re: One more...

Ravi Bhavnani1-Aug-02 12:38

Ravi Bhavnani

1-Aug-02 12:38

I fear I was too quick to claim success. Cry | :((

Callbacks are indeed supported, but apparently MS never got around to making CInternetSession asynch. I suppose the only way to do asynch downloads (using CInternetSession) is by using threads. But this CP article[^] may shed more light than I was able to provide.

Good luck!

/ravi

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

Alrighty

LukeyBoy1-Aug-02 12:44

LukeyBoy

1-Aug-02 12:44

That's probably the easiest way in the end. Thanks for all the help Ravi!

Encoding

Hans Ruck1-Aug-02 8:08

Hans Ruck

1-Aug-02 8:08

I need to encode a .exe file in order to put its content into some XML's CDATA. Is there any code here on CP handling such task?

rechi

Re: Encoding

Joaquín M López Muñoz1-Aug-02 8:27

Joaquín M López Muñoz

1-Aug-02 8:27

If you're not searching for any particular encoding mechanism, one of the simplest is to substitute every byte by its representantion in hexadecimal. Doing such a coder/encoder is trivial.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

inclusion of help

SilentWarrior1-Aug-02 7:37

SilentWarrior

1-Aug-02 7:37

i have made a help file by using help tool provided by microsoft visual tools.
now i want to include that in my project . please tellme how to include those files in the project,
thanks

looking forward from all the gurus of code

Re: inclusion of help

Ravi Bhavnani1-Aug-02 10:01

Ravi Bhavnani

1-Aug-02 10:01

You'll find an abundance of information here[^].

/ravi

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

Creating ActiveX controls in ActiveX Property pages

Zac Howland1-Aug-02 7:26

Zac Howland

1-Aug-02 7:26

I have an OCX that I wrote containing two controls: a serial port enumerator (gives a list of the available serial ports on a system), and a serial port control (does the communications, event firing etc). The enumerator doesn't have any properties (just 1 method that returns a SAFEARRAY of BSTRs with port names). The serial port control has the usual serial port properties (baud rate, parity, handshaking, data bits, stop bits, and which events the user wants notification of). In the InitDialog function of the Serial port's property page, I wanted to use the Enumerator to fill in a combo box with the port names. However, when I try this, it gives an exception and crashes whatever container it is in. Here is how I am trying to create the enumerator control:

<br />
BOOL CSerialPortPropPage::OnInitDialog() <br />
{<br />
    COlePropertyPage::OnInitDialog();<br />
    CWnd	wndEnum;<br />
    CRect	rc;<br />
<br />
    rc.SetRect(0, 0, 0, 0);<br />
    if (FALSE == wndEnum.CreateControl(_T("SERIALPORT.SerialEnumeratorCtrl.1"), NULL, 0, rc, this, 5000))<br />
        AfxMessageBox("Enumerator Creation failed!");<br />
    else<br />
        AfxMessageBox("Enumerator Creation Passed!");<br />
<br />
    return FALSE; // since this is an OCX property page, return FALSE<br />

Is there something I am doing wrong (I've been looking at it way too long . . . everything looks okay to me, but it still isn't working).

If this isn't correct, does anyone have a better way of accomplishing this?

Thanks
Zac Howland

"If I create everything new, why would I want to delete anything?"

Re: Creating ActiveX controls in ActiveX Property pages

Ernest Laurentin1-Aug-02 11:19

Ernest Laurentin

1-Aug-02 11:19

Did you call AfxEnableControlContainer()?

As my daughter would say, "... Whatever!"

Re: Creating ActiveX controls in ActiveX Property pages

Zac Howland2-Aug-02 5:36

Zac Howland

2-Aug-02 5:36

Yes, I called that in the module's InitInstance. Here is the code that throws the assertion in the test container:

<br />
BOOL CWnd::Attach(HWND hWndNew)<br />
{<br />
    ASSERT(m_hWnd == NULL);     // only attach once, detach on destroy<br />
    ASSERT(FromHandlePermanent(hWndNew) == NULL);<br />
        // must not already be in permanent map<br />
<br />
    if (hWndNew == NULL)<br />
        return FALSE;<br />
<br />
    CHandleMap* pMap = afxMapHWND(TRUE); // create map if not exist<br />
    ASSERT(pMap != NULL);<br />
<br />
    pMap->SetPermanent(m_hWnd = hWndNew, this);<br />
<br />
#ifndef _AFX_NO_OCC_SUPPORT<br />
    AttachControlSite(pMap);<br />
#endif<br />
<br />
    return TRUE;<br />
}<br />

I am not sure how it already has a Permanent handle since I just created the object on the stack. Any thoughts?

Thanks again
Zac

"If I create everything new, why would I want to delete anything?"

Paragraphs on a CView

JennyP1-Aug-02 7:09

JennyP

1-Aug-02 7:09

Hello,

What's the most expedient way to simply paint a formatted text paragraph (CString) on to a CView inherited window? I'm running in to a morass of non-wrapping text positioning issues... I just want a self wrapping rectangle or, perhaps a text painter that recognizes the \n in the string.

Thanks!

JennyP

Re: Paragraphs on a CView

PJ Arends1-Aug-02 7:16

PJ Arends

1-Aug-02 7:16

Take a look at DrawText(), especially the DT_CALCRECT and DT_WORDBREAK flags

HTH

CPUA 0x5041

Sonork 100.11743 Chicken Little

"So it can now be written in stone as a testament to humanities achievments "PJ did Pi at CP"." Colin Davies

Within you lies the power for good - Use it!

Re: Paragraphs on a CView

JennyP1-Aug-02 7:41

JennyP

1-Aug-02 7:41

EXACTLY WHAT I WANTED! Thanks! Smile | :)

JennyP

CFileDialog SaveAs Question

moobob1-Aug-02 6:53

moobob

1-Aug-02 6:53

Is there anyway to change the Save button text of the SaveAs dialog of the CFileDialog class to be something else?

Thanks in advance,
Bob

Re: CFileDialog SaveAs Question

C^hris L^osinger1-Aug-02 6:56

C^hris L^osinger

1-Aug-02 6:56

derive a class from CFileDialog. override OnInitDialog. then, do this:

GetParent()->GetDlgItem(IDOK)->SetWindowText("My new label");

-c

To explain Donald Knuth's relevance to computing is like explaining Paul's relevance to the Catholic Church. He isn't God, he isn't the Son of God, but he was sent by God to explain God to the masses.
/. #3848917

image effects!

Re: CFileDialog SaveAs Question

moobob1-Aug-02 7:29

moobob

1-Aug-02 7:29

Chris,

Thanks for your response. I tried as you suggested, but it crashes. If I do a

	<br />
CFileDialog dlg(FALSE, "*.imp", NULL, NULL, szFilter);<br />
CWnd *wnd = dlg.GetDlgItem(IDOK);<br />

it crashes on the dlg.GetDlgItem call. dlg.hWnd = 0.

Perhaps I'm doing this in the wrong place?

Thanks,
Bob

Re: CFileDialog SaveAs Question

C^hris L^osinger1-Aug-02 7:32

C^hris L^osinger

1-Aug-02 7:32

moobob wrote:
Perhaps I'm doing this in the wrong place?

yup

1. derive a class from CFileDialog (you have to make a new class, not just instantiate a CFileDialog). ClassWizard can help with this.

2. override OnIntiDialog in that derived class (not in the class that uses the new CFileDialog)

3. put that line of code in the derived class's OnInitDialog

-c

image effects!

Re: CFileDialog SaveAs Question

moobob1-Aug-02 7:39

moobob

1-Aug-02 7:39

Thanks Chris!

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