C / C++ / MFC

Pazzuzu21-Jun-04 4:06

Pazzuzu

21-Jun-04 4:06

Thank you for that......

show dialog in a dll

yingkou21-Jun-04 3:22

yingkou

21-Jun-04 3:22

I have inserted a dialog to my Dll and generate a class named as CTestDlg by the classview. I alse write a dllexport function:TestDlg

void __declspec(dllexport) __stdcall TestDlg()
{
CTestDlg dlg;
dlg.DoModal();
}

I have checked this dll in an application,but the dialog is not shown,why?

Re: show dialog in a dll

rrrado21-Jun-04 3:51

rrrado

21-Jun-04 3:51

Try this (from msdn) :

You must add the AFX_MANAGE_STATE macro at the begining of all the exported functions in regular DLLs that dynamically link to MFC to set the current module state to the one for the DLL. This is done by adding the following line of code to the beginning of functions exported from the DLL:

AFX_MANAGE_STATE(AfxGetStaticModuleState( ))

rrrado

Re: show dialog in a dll

wb21-Jun-04 10:59

21-Jun-04 10:59

search this forum, somedays ago
there was a similar question.
Its because the ressources (the DLG template)
is loaded from the MainApp ressources and not
from the DLL ressources.

Device context questions

Pazzuzu21-Jun-04 3:18

Pazzuzu

21-Jun-04 3:18

Hi Guys,

Would like to what is wrong with the following...

[1]Iam drawing to a screen the contents of a page(say, 1st page) & some rectangles as well.(Mfc application-using deviceContext)
Now,I want to load a different page(say, 2nd page) with no figures.
How will I clear everything from screen for drawing the 2nd page,so that the 2nd page doesnt overlap on the contents of the first page...

[2]

// In the MFC generated OnDraw
// m_drawer is a pointer to my defined class to which Iam passing the DC for drawing.

void CMfcTestView::OnDraw(CDC* pDC)
{
CMfcTestDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
m_drawer->AttachDC(pDC);
}
// Have another function to draw a line to screen on the button down action.

void CMfcTestView::OnLButtonDown(UINT nFlags, CPoint point)
{
CView::OnLButtonDown(nFlags, point);
m_drawer->DrawLine();
}

void DrawLine()
{
CPen newPen(PS_SOLID,2,RGB(color[0],color[1],color[2]));
CPen *pOldPen = m_deviceContext->SelectObject(&newPen);
//Drawing Line
// This call gives me a assertion failure in wingdi.cpp
m_deviceContext->MoveTo(offset,initialyPos);

}

There is no assertion failure when I call "m_drawer->DrawLine()" from OnDraw().
What could be the reason of this.....

Thanks..

Blake Miller21-Jun-04 3:23

Blake Miller

21-Jun-04 3:23

I think the DC you receive in OnDraw is the result of a lower level BeginPaint call.
The DC is released once the 'painting cycle' has completed - after your OnDraw returns, the DC is no longer valid.
You might be retaining it too long.

Pazzuzu21-Jun-04 3:26

Pazzuzu

21-Jun-04 3:26

Thanks,That might be the reason.Will check that.
Could u put some light on the first part of my question...

Thanks.

IE/WebBrowser control stealing focus

Blake Miller21-Jun-04 3:40

Blake Miller

21-Jun-04 3:40

Get the extents of your device context.
See CDC::GetWindowExt in MSDN
Create a 'solid' brush the color of the background.
See CBrush::CreateBrushIndirect in MSDN
Then fill a rectangle the size of your DC to 'erase' the background
See CDC::FillRect in MSDN or try CDC::FillSolidRect - then you do not need the brush.

rrrado21-Jun-04 2:21

rrrado

21-Jun-04 2:21

I'm using WebBrowser control in my application in modeless dialog,
so it can download and display web page in background.
But sometimes WebBrowser set focus to this dialog and brings it to the top
when it finished downloading the page, so it will interrupt user while typing to another window.
How to prevent this ?
Thank you !

rrrado

WinXP log in screen

sirtimid21-Jun-04 2:15

sirtimid

21-Jun-04 2:15

I would like to make an app to secure the pc (running windows xp) with a password.
Does anybody know how to replace, or bypass with any way, the log in screen of windows XP?

Thanks in Advance,
sirtimid

Antony M Kancidrowski21-Jun-04 2:44

Antony M Kancidrowski

21-Jun-04 2:44

You want to write an application that secures Windows XP by bypassing it's login security!?! Confused | :confused:

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fuity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

Message Closed

21-Jun-04 2:59

Lars Lundstedt

21-Jun-04 2:59

Message Closed

modified 7-Jun-22 3:31am.

sirtimid21-Jun-04 3:14

sirtimid

21-Jun-04 3:14

I have seen this in windows 2000. A big company have developed that application. It is a log in security application.
they had replace the log in dialog with a similar one that they made it!!

Maximilien21-Jun-04 3:26

Maximilien

21-Jun-04 3:26

ask gina, maybe she can answer your question.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Can i redirect the ouput of Debug window to a Text file?

jmkhael21-Jun-04 3:44

jmkhael

21-Jun-04 3:44

This[^] should help

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

DHTML + VC++

Anonymous21-Jun-04 2:01

Anonymous

21-Jun-04 2:01

I want to fetch data from a databse and populate a DHTML view at run time.Also, if theres is a change in value of any of the objects in database, the change should be immediately reflected in the view.How can i achieve that.

Re: DHTML + VC++

Andrew Quinn AUS21-Jun-04 4:44

Andrew Quinn AUS

21-Jun-04 4:44

Not asking alot then Wink | ;)

You have two options:

1. As you say, use DHTML to update the information in the page. This can be labourious work and imo ties the VC application too tightly to the HTML page.

2. Grab the data from the db and generate an XML string from the data, pass this XML string to a JScript function on the web page that will parse the XML data and make changes to the display accordingly.

To call a JScript function on a web page from VC use the following:

MSHTML::IHTMLDocument2Ptr spDoc(m_ctlWeb1.GetDocument());
if (spDoc)
{
    IDispatchPtr spDisp(spDoc->GetScript());
    if (spDisp)
    {
        OLECHAR FAR* szMember = L"Populate";
        DISPID dispid;

        HRESULT hr = spDisp->GetIDsOfNames(IID_NULL, &szMember, 1, LOCALE_SYSTEM_DEFAULT, &dispid);
        if (SUCCEEDED(hr)) // found function
        {
            COleVariant vtResult;
            static BYTE params[] = VTS_BSTR;

            COleDispatchDriver dispDriver(spDisp);

            dispDriver.InvokeHelper(dispid, DISPATCH_METHOD, VT_VARIANT, (void*)&vtResult, params, strXML);

            BOOL bSuccess = vtResult.boolVal;
        }
    }
}

So the above will call the Populate JScript function in the current page that takes 1 parameter (sent as a string)

Then in your HTML page have a function, e.g.

// create on page load to stop expensive load and unload of the XML Document COM object
var oXmlDoc = new ActiveXObject("MSXML2.DOMDocument.4.0");
function Populate(strXML)
{
   bSuccess = false;
   // create an xml document to load the XML into
   if (oXmlDoc)
   {
       oXmlDoc.async = false;
       oXmlDoc.resolveExternals = false;
       if (oXmlDoc.loadXML(strXML))
       {
           // success, now parse to see what we need to update
           var oNode = oXmlDoc.selectSingleNode("/update/field");
           if (oNode)
           {
               // get the element in the page
               var elField = document.getElementById("idField");
               if (elField) elField.innerText = oNode.innerText;
               bSuccess = true;
           }
       }
   }
   return bSuccess;
}

This way you are free to change the way the HTML looks and feels as much as you like. It's not the job of the VC app to render the information but the HTML page. You could even have several HTML pages that render the information in different ways - as long as the XML is common to all.

Hope this helps,
Andy

uus9921-Jun-04 0:13

uus99

21-Jun-04 0:13

My program calls many functions and interates in many loops. To debug the program, i've placed TRACE calls all over the place, but it seems, when the program runs, not all the TRACE outputs are displayed, they are truncated. I guess there isnt enought place/memory for the debug window, how can i redirect it to a text file?

Thx.

Re: Can i redirect the ouput of Debug window to a Text file?

jmkhael21-Jun-04 0:56

jmkhael

21-Jun-04 0:56

Check _CrtSetReportFile

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

portscandetector

ask_you20-Jun-04 23:54

ask_you

20-Jun-04 23:54

can anyone give me an idea about how to develop a portscandetector??

ThatsAlok21-Jun-04 0:51

ThatsAlok

21-Jun-04 0:51

here is your idea
first create a socket connection using
CSocket or CAsyncSocket in mFC
or use core Socket api's

now check each port in computer.
if you socket connected to that port mean the port is open else it is not. Smile | :)

I Think It will Work
Alok Gupta
visit me at http://www.thisisalok.tk

gamitech22-Jun-04 13:37

gamitech

22-Jun-04 13:37

yes but what if the ports do not accept all connections

gabby

ThatsAlok24-Jun-04 3:51

ThatsAlok

24-Jun-04 3:51

ok i agree with you inthis topic.
yeah it possible that if the port don't allow to connect we can't do any thing

i think i have to work on it thanks for suggestion

I Think It will Work
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Henry miller21-Jun-04 3:44

Henry miller

21-Jun-04 3:44

If you want to check for someone port scanning your machine you open a bunch of ports on your machine where nothing is running. If something hits several of them you know you are beind port scanned.

More complex is to listen for all packets, and decode the raw packets. Look for connection attempts, and if you see multipul connections you know you are being port scanned.

The hard part is telling the difference between acidental connections to your machine (someone who intended a different machine but typed the wrong address), and a port scan. Portscanners may run with several machines over a long time, hoping the port scan will not trip your detector instead it looks like the former.