C / C++ / MFC

CPallini12-Jun-08 2:39

CPallini

12-Jun-08 2:39

Sorry my Code Project Mind Reader Unit is out of order today.
BTW what was the error message shown?
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

theCPkid12-Jun-08 3:06

theCPkid

12-Jun-08 3:06

Dear!
If your problem is similar to
http://groups.google.com/group/microsoft.public.dotnet.framework/browse_thread/thread/dfd37eb8a077e9f0?hl=en#

http://forums.msdn.microsoft.com/en-US/netfxsetup/threads/ ( search for 1603 error in installation of WPF in google)

These two threads were started by me and the only option is to either format your PC and install VS 2008 before installing anything else or call microsoft support service.

If you still want to give a try, then this is the first and last place to visit -
http://blogs.msdn.com/astebner/archive/2008/03/28/8342307.aspx

write to aaron stebner if his blog does not help. he may help you.

Good luck and do tell us whether you were able to solve your problem and how!

Mark Salsbery12-Jun-08 6:11

Mark Salsbery

12-Jun-08 6:11

You can try:

Uninstall all previous .NET 3.5 framework installs
Make sure there's no previous Visual Studio 2008 versions installed
Install .NET Framework 3.5[^]
Install Visual Studio 2008

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

How to search and delete a file

led mike12-Jun-08 6:48

led mike

12-Jun-08 6:48

You forgot format C:

led mike

Shirani12-Jun-08 1:18

Shirani

12-Jun-08 1:18

Hi guys i am new in MFC i want to know how to search for a specific file and delete it. ?? So please help me. I didn't find any any function for deleting like rename(brfore,after) for renaming a file or folder name.

Regards:
Xohaib Shirani

_AnsHUMAN_ 12-Jun-08 1:44

_AnsHUMAN_

12-Jun-08 1:44

Use FindFirstFile()/FindFirstFileEx() to find a file with a specifc name. DeleteFile() to delete it

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

vijay_aroli12-Jun-08 2:36

vijay_aroli

12-Jun-08 2:36

If you already know the path of the file to be deleted, then you don't have to search for it. You can use PathFileExists() function to see if the file exists. you can also use the function PathIsDirectory() to see if given path is that of a directory or a file. The below code snippet might make the point clear to you.

TCHAR szFilePath[MAX_PATH];
_tcscpy(szFilePath, _T("C:\\file.txt") );

//Check if the file with the given path really exists and is not a directory.
if(PathFileExists(szFilePath) && !PathIsDirectory(szFilePath))
      DeleteFile(szFilePath);//delete the file 'C:\file.txt'

Regards,
Vijay.

Shirani12-Jun-08 6:39

Shirani

12-Jun-08 6:39

error C2065: 'PathFileExists' : undeclared identifier
error C2065: 'PathIsDirectory' : undeclared identifier

Regards:
Xohaib Shirani

AfxCallWndProc and custom control development

Eytukan12-Jun-08 7:52

Eytukan

12-Jun-08 7:52

Header shlwapi.h
Import library shlwapi.lib

OK,. what country just started work for the day ? The ASP.NET forum is flooded with retarded questions. -Christian Graus

Best wishes to Rexx[^]

sawerr12-Jun-08 1:11

sawerr

12-Jun-08 1:11

Hi
In Programming with Microsoft Visual C++.NET book, author shows a custom control dll. In his code:

LRESULT CALLBACK AFX_EXPORT
    RygWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    AFX_MANAGE_STATE(AfxGetStaticModuleState());

    CWnd* pWnd;

    pWnd = CWnd::FromHandlePermanent(hWnd);
    if (pWnd == NULL) {
        // Assume that client created a CRygWnd window
        pWnd = new CRygWnd();
        pWnd->Attach(hWnd);
    }
    ASSERT(pWnd->m_hWnd == hWnd);
    ASSERT(pWnd == CWnd::FromHandlePermanent(hWnd));
    LRESULT lResult = AfxCallWndProc(pWnd, hWnd, message,
                                     wParam, lParam);
    return lResult;
}

I downloaded The Ultimate Toolbox code, there is no call to AfxCallWndProc
For example:

BOOL COXTabViewContainer::Create(CWnd* pParentWnd, CRect rect/*=CRect(0,0,0,0)*/,
								 DWORD dwStyle/*=WS_CHILD|WS_VISIBLE*/, 
								 UINT nID/*=AFX_IDW_PANE_FIRST*/)
{
	ASSERT(pParentWnd != NULL);
	ASSERT(dwStyle & WS_CHILD);
	ASSERT(nID != 0);

	// the Windows scroll bar styles bits turn on the smart scrollbars
	DWORD dwCreateStyle=dwStyle&~(WS_HSCROLL|WS_VSCROLL);
	dwCreateStyle&=~WS_BORDER;

	dwCreateStyle|=WS_CHILD;

	// define our own window class 
	WNDCLASS wndClass;
	wndClass.style=CS_DBLCLKS; 
    wndClass.lpfnWndProc=AfxWndProc; 
    wndClass.cbClsExtra=0; 
    wndClass.cbWndExtra=0; 
    wndClass.hInstance=AfxGetInstanceHandle(); 
    wndClass.hIcon=0; 
    wndClass.hCursor=::LoadCursor(NULL,IDC_ARROW); 
    wndClass.hbrBackground=(HBRUSH)(COLOR_BTNFACE+1); 
    wndClass.lpszMenuName=NULL; 
	wndClass.lpszClassName=_T("TabViewContainer");
	
	if(!AfxRegisterClass(&wndClass))
		return FALSE;

	if (!CreateEx(WS_EX_CLIENTEDGE,wndClass.lpszClassName,NULL,
		dwCreateStyle,rect.left,rect.top,rect.Width(),rect.Height(),
		pParentWnd->m_hWnd,(HMENU)(INT_PTR)nID,NULL))
	{
		return FALSE;       // create invisible
	}

	// remove WS_EX_CLIENTEDGE style from parent window
	pParentWnd->ModifyStyleEx(WS_EX_CLIENTEDGE, 0, SWP_DRAWFRAME);

	// sign 
	::SetWindowLongPtr(GetSafeHwnd(),GWL_USERDATA,ID_TABVIEWCONTAINER_SIGN);

	SetScrollStyle(0,TRUE);

	CalcLayout();

	return TRUE;
}

In MSJ for AfxCallWndProc:

You can think of AfxWndProc as a function with a big switch statement that routes WM_XXX messages to your window class's OnXXX handler functions. This is a first-order approximation of how AfxWndProc works:

// This is a gross simplification
LRESULT AfxWndProc(HWND hwnd, UINT msg, ...)
{
CWnd* pWnd = CWnd::FromHandle(hwnd);
switch (msg) {
case WM_CREATE:
pWnd->OnCreate(...);
return 0;
case WM_SETFOCUS:
pWnd->OnSetFocus(...);
return 0;
.
.
.
// etc.
}
return 0L;
}

If AfxWndProc routes WM_XXX messages to window class's OnXXX handler functions, why didn't Ultimate toolbox use it?
If i derive a class from any MFC wnd class(CWnd, CFrameWnd, CEdit etc...) haven't it got all the default wndproc for messages(because i derived it from CWnd class)? So why do we need to call AfxWndProc?

How can I get byte pointers to give CString values ?

SherTeks12-Jun-08 0:56

SherTeks

12-Jun-08 0:56

I have this code snippet which writes an encrypted value of a string into a file
(KEY_FILE -- #defined as C:\xyz.txt) ;

BYTE *pbBlob;
DWORD cbBlob;


	:
	:
	:



if (!CryptExportKey(hSessionKey, hKey, SIMPLEBLOB, 0, NULL, &amp;amp;cbBlob))
{
	dwResult = GetLastError();
	MessageBox("Error CryptExportKey() failed.", "Information", MB_OK);
	return;
}
if (!CryptExportKey(hSessionKey, hKey, SIMPLEBLOB, 0, NULL, &amp;amp;cbBlob))
{
	dwResult = GetLastError();
	MessageBox("Error CryptExportKey() failed.", "Information", MB_OK);
	return;
}
if ((pbBlob = (BYTE *) LocalAlloc(LMEM_ZEROINIT,cbBlob)) == NULL)
{
	dwResult = ERROR_NOT_ENOUGH_MEMORY;
	MessageBox("Error LocalAlloc() failed.", "Information", MB_OK);
	return;
}
if (!CryptExportKey(hSessionKey, hKey, SIMPLEBLOB, 0, pbBlob, &amp;amp;cbBlob))
{
	dwResult = GetLastError();
	MessageBox("Error CryptExportKey() failed.", "Information", MB_OK);
	return;
}

if(hSessionKey != 0) 
CryptDestroyKey(hSessionKey);

hSessionKey = 0;


FILE *fp = fopen(KEY_FILE, "w+b");
if (fp) {
	fwrite(pbBlob, 1, cbBlob, fp);
	fclose(fp);
}

I find a junk value written by the above code in "C:\xyz.txt" which is like :

h ¤ zÛ³Wp &amp;lt;ø®lŒoWP¸"Ç^1iM€ÌygUjŽæ#Eì}ÔKËëü’²ôâ&amp;nbsp; äÃr[X&amp;gt;¾U

Since, the file contained

h ¤ zÛ³Wp &amp;lt;ø®lŒoWP¸"Ç^1iM€ÌygUjŽæ#Eì}ÔKËëü’²ôâ&amp;nbsp; äÃr[X&amp;gt;¾U string,

I was expecting pbBlob to point to the above content ie.

h ¤ zÛ³Wp &amp;lt;ø®lŒoWP¸"Ç^1iM€ÌygUjŽæ#Eì}ÔKËëü’²ôâ&amp;nbsp; äÃr[X&amp;gt;¾U

But when I debug, the following line

fwrite(pbBlob, 1, cbBlob, fp)

shows me the value of pbBlob = "||" and cbBlob = 76

What is the problem here. How can I get the junk value in a CString ?
Will some kind of casting help ?

Re: How can I get byte pointers to give CString values ?

SandipG 12-Jun-08 2:09

SandipG

12-Jun-08 2:09

Go to memory address pointed by pbBlob and have a look at the contents. Watch window will not show you full contents.
and dont compare it with the contents of notepad. Open the file in VC++ IDE it will show you all hex as well as text data then compare it.

Regards,
Sandip.

Re: How can I get byte pointers to give CString values ?

RockyJames12-Jun-08 2:12

RockyJames

12-Jun-08 2:12

Enable dispaly unicode strings settings in the IDE.

Re: How can I get byte pointers to give CString values ?

SandipG 12-Jun-08 2:16

SandipG

12-Jun-08 2:16

Is this option avaialbe in VC++6.0.
Thanks a lot.

Regards,
Sandip.

Re: How can I get byte pointers to give CString values ?

RockyJames12-Jun-08 3:11

RockyJames

12-Jun-08 3:11

yes it is available.

Re: How can I get byte pointers to give CString values ?

SherTeks12-Jun-08 21:26

SherTeks

12-Jun-08 21:26

The following code snippet worked out for me in getting the junk value (stored in the file) into a CString
value.

CString csEncryptedString(_T(""));
char *pEncryptedString = new char;

for (INT i = 0; i < (int)cbBlob; i++)
{
    if (pbBlob[i] == '\0')
    {
        pEncryptedString[i] = '-';
    }
    else
    {
        pEncryptedString[i] = pbBlob[i];
    }
}
pEncryptedString[cbBlob + 1] = '\0';

csEncryptedString = pEncryptedString;

Thanks all for your various suggestions and support.

Any other efficient code is always welcome.

leonigah12-Jun-08 0:53

12-Jun-08 0:53

How to get Windows user's Login and Logout time?

Nigah M Manzoor

Nibu babu thomas12-Jun-08 3:04

Nibu babu thomas

12-Jun-08 3:04

Using COM it's possible, though I haven't used it at all, just did a quick search and found this for you...

IADsUser COM interface provides these methods for you, google for more information...

get_LastLogin
get_LastLogoff

Nibu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

leonigah12-Jun-08 20:28

12-Jun-08 20:28

thanx,

Nigah M Manzoor

leonigah12-Jun-08 20:28

12-Jun-08 20:28

thanx,
its working

Nigah M Manzoor

Nibu babu thomas12-Jun-08 20:49

Nibu babu thomas

12-Jun-08 20:49

leonigah wrote:
thanx,
its working

Welcome.

I am curious to see the code! Is it possible? Smile | :)

Nibu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

David Crow12-Jun-08 4:03

David Crow

12-Jun-08 4:03

You might look into the ISensLogon interface.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

leonigah12-Jun-08 23:51