Re: Controlling Display Device - C / C++ / MFC Discussion Boards

Re: Login Dialog Probelm

MsmVc9-Dec-08 17:35

MsmVc

9-Dec-08 17:35

Thanks

Reg : inheritance

pooja_friends5-Dec-08 1:19

pooja_friends

5-Dec-08 1:19

I have following Dialog class in same project.

LoaderDlg.cpp
SettingDlg.cpp

in LoaderDlg.cpp i have fetched some value using WMI quary(in publi function,public varible).

I want to access those values from settingDlg.cpp . how i do that.

Help Me Smile | :)

Re: Reg : inheritance

Code-o-mat5-Dec-08 1:29

Code-o-mat

5-Dec-08 1:29

For one, LoadDlg.cpp and SettingDlg.cpp are source files (i assume), not classes. And for two, that mostly depends on the context, you could for example give the value you set in your loaderdlg as a parameter to the setting dialog class's constructor, or store it in a global variable, or or or...

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Re: Reg : inheritance

pooja_friends5-Dec-08 2:00

pooja_friends

5-Dec-08 2:00

I have calling the settings dlg in on button click of loaderdlg.Like as following.How i send a value to settings dialog from loaderdlg.

Settings dlg;
dlg.DoModal();

Re: Reg : inheritance

Code-o-mat5-Dec-08 2:09

Code-o-mat

5-Dec-08 2:09

Well, either give that value to your setting dlg as a parameter thorough its constructor (and store it in your setting dialog class as a member), or give a pointer to your loader dialog the same way and when you need the variable, use the pointer to access the value. Or if you need that variable after your setting window has been created, you can also try calling GetParent() in your setting dialog, convert what you get to the class of your load dialog and then access the meber as you must. But this later method is a bit ugly (what if you want to display your setting dialog from somewhere else os its parent won't be something else than your load dialog?).

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Re: Reg : inheritance

CPallini5-Dec-08 2:01

CPallini

5-Dec-08 2:01

Your problem has nothing to do with inheritance (if I got you). Check out toxcct's nice article on dialog communication [^].
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

[My articles]

Controlling Display Device

Muneeb Abdul Shakoor5-Dec-08 1:01

Muneeb Abdul Shakoor

5-Dec-08 1:01

Hi!
I want to give option to the user to select the display device his/her self if his/her computer is connected to multiple devices in my MFC application. Can anyone has idea about how to do it? And what are the APIs that give you the list of available display devices?

Re: Controlling Display Device

Mark Salsbery5-Dec-08 4:53

Mark Salsbery

5-Dec-08 4:53

These may be a place to start...

GDI: EnumDisplayDevices[^]
WMI: Win32_VideoController Class[^]

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

Please help me with my decryption it almost works

monsieur_jj4-Dec-08 23:23

monsieur_jj

4-Dec-08 23:23

This is my code:
It gives me true when I perform the function crypt decrypt its just that I am expecting this output : aHR0cDovL2xvY2FsaG9zdDo4MDgwL015V2ViL21hbmFnZXBvaW50L21hbmFnZXBvaW50MzQxLnppcA==
Then when I decode it Ill should get a link but instead cryptdecrypt gives me trash which I cant convert to the right link

LPTSTR Base64Decode(LPCTSTR lpData, DWORD dwSize)
{
	DWORD dwResult = 0;
	if(CryptStringToBinary(lpData, dwSize, CRYPT_STRING_BASE64, NULL, &dwResult,NULL,NULL))
	{
		LPTSTR lpszBase64Decoded = new TCHAR[dwResult+(sizeof(TCHAR) * 2)];
		memset(lpszBase64Decoded,0,dwResult);
		if(CryptStringToBinary(lpData, dwSize, CRYPT_STRING_BASE64,(BYTE *)lpszBase64Decoded, &dwResult,NULL,NULL))
		{
			*(LPWORD)(lpszBase64Decoded + (dwResult / sizeof(TCHAR))) = 0;

			return lpszBase64Decoded;
		}
	}
	return NULL;
}

LPTSTR Base64Encode(LPCBYTE lpData, DWORD dwSize, BOOL bStripCRLF, DWORD *dwBufSize)
{
	DWORD dwResult = 0;
	if(CryptBinaryToString(lpData, dwSize, CRYPT_STRING_BASE64, NULL, &dwResult))
	{
		LPTSTR lpszBase64 = new TCHAR[dwResult];
		if(CryptBinaryToString(lpData, dwSize, CRYPT_STRING_BASE64, lpszBase64, &dwResult))
		{
			TCHAR pByteLF = *(LPWORD)(lpszBase64 + dwResult -1);
			TCHAR pByteCR = *(LPWORD)(lpszBase64 + dwResult -2);
			if(pByteCR == 0x0D && pByteLF == 0x0A)
			{
				*(LPWORD)(lpszBase64 + dwResult -2) = 0;
			}
			*dwBufSize = dwResult;
			return lpszBase64;
		}
	}
	return NULL;
}


BYTE* Base64Decode2(LPCTSTR lpData, DWORD dwSize, DWORD *dwBufSize)
{
	DWORD dwResult = 0;
	if(CryptStringToBinary(lpData, dwSize, CRYPT_STRING_BASE64, NULL, &dwResult,NULL,NULL))
	{
		BYTE * decodedStr;
		decodedStr = new BYTE;
		LPTSTR lpszBase64Decoded = new TCHAR[dwResult+(sizeof(TCHAR) * 2)];
		memset(decodedStr,0,dwResult);
		if(CryptStringToBinary(lpData, dwSize, CRYPT_STRING_BASE64,decodedStr, &dwResult,NULL,NULL))
		{
			*dwBufSize = dwResult;
			return decodedStr;
		}
	}
	return NULL;
}
LPTSTR Base64Encode2(BYTE* lpData, DWORD dwSize, BOOL bStripCRLF, DWORD *dwbufSize)
{
	DWORD dwResult = 0;
	if(CryptBinaryToString(lpData, dwSize, CRYPT_STRING_BASE64, NULL, &dwResult))
	{
		LPTSTR lpszBase64 = new TCHAR[dwResult];
		if(CryptBinaryToString(lpData, dwSize, CRYPT_STRING_BASE64, lpszBase64, &dwResult))
		{
			TCHAR pByteLF = *(LPWORD)(lpszBase64 + dwResult -1);
			TCHAR pByteCR = *(LPWORD)(lpszBase64 + dwResult -2);
			if(pByteCR == 0x0D && pByteLF == 0x0A)
			{
				*(LPWORD)(lpszBase64 + dwResult -2) = 0;
			}
			*dwbufSize = dwResult;
			return lpszBase64;
		}
	}
	return NULL;
}
DWORD TripleDESdecrypt(TCHAR *cyphertext,DWORD ctlen,TCHAR *passwd,DWORD pwlen,TCHAR *plaintext,DWORD *ptlen)
{
	HCRYPTPROV hProv;
	HCRYPTHASH hHash;
	HCRYPTKEY hKey;
	DWORD dwSizeNeeded =0;

	BOOL result = CryptAcquireContext(&hProv,NULL,MS_STRONG_PROV,PROV_RSA_FULL,0);
	result = CryptCreateHash(hProv,CALG_MD5,0,0,&hHash);
	result = CryptHashData(hHash,(BYTE *)passwd,pwlen,0);
	result = CryptDeriveKey(hProv,CALG_3DES,hHash,0,&hKey);
	BYTE PadMode = CRYPT_MODE_ECB;
	result = CryptSetKeyParam(hKey, PKCS5_PADDING, &PadMode, 0);
	if(*ptlen >= ctlen)
	{
		memcpy(plaintext,cyphertext,*ptlen);
		result = CryptDecrypt(hKey,NULL,1,0,(BYTE *)plaintext,&ctlen);
		*ptlen=ctlen;
	}
	else
	{
		dwSizeNeeded = ctlen * sizeof(TCHAR);
	}
	CryptDestroyKey(hKey);
	CryptDestroyHash(hHash);
	CryptReleaseContext(hProv,0);
	return dwSizeNeeded;
}
int main()
{
	
	BYTE* decodedStr;
	HCRYPTPROV hCryptProv;
	HCRYPTHASH hHash = 0;
	HCRYPTKEY hKey = 0;

	TCHAR szKey[] = _T("h3bmull3r");
	TCHAR szUnencrypted[] = _T("");
	TCHAR * pszEncrypted = NULL;
	TCHAR * pszBase64 = NULL;
	TCHAR * pszBase64Decoded = NULL;
	TCHAR * psz3DESDecoded = NULL;
	DWORD dwSizeNeeded;
	DWORD BufSize;
	DWORD dwUnEncryptedSize;
	DWORD dwEncryptedSize;
	DWORD KeySize;

	////convert Key
	TCHAR * NewKey  = Base64Encode((LPCBYTE)&szKey,_tcslen(szKey) * sizeof(TCHAR),FALSE, &KeySize);
	_tcscpy(szKey, NewKey);

	pszBase64 = _T("bZVLVixsjgTxsWbwmAGitRR0T86AM9Kam4BYRR+Dukc9p9vhwUBAzCSlZ463ZInufJRE+7ridImlz/aJUJbVhg==");

	BYTE* TEST = Base64Decode2(pszBase64,_tcslen(pszBase64) * sizeof(TCHAR), &dwEncryptedSize);
	TCHAR * pszEncrypted2 = reinterpret_cast<TCHAR *>(TEST);
	pszEncrypted = pszEncrypted2;
	//Decrypt the string with 3DES algorithm using key
	dwUnEncryptedSize = NULL;
	dwSizeNeeded = TripleDESdecrypt(pszEncrypted,dwEncryptedSize * sizeof(TCHAR),szKey,_tcslen(szKey),szUnencrypted,&dwUnEncryptedSize);
	psz3DESDecoded = new TCHAR[dwSizeNeeded];
	TripleDESdecrypt(pszEncrypted,dwEncryptedSize * sizeof(TCHAR),szKey,_tcslen(szKey),psz3DESDecoded,&dwSizeNeeded);
	//Decode the base64 encoded message back to ascii
	pszBase64Decoded = Base64Decode(psz3DESDecoded,_tcslen(psz3DESDecoded) * sizeof(TCHAR));

\



	//Do they match?

	MessageBox(NULL,0 == _tcscmp(pszBase64Decoded,szUnencrypted) ? _T("Strings Match"):_T("Strings do NOT Match"),_T(""),MB_OK);

	delete [] pszBase64;
	delete [] pszBase64Decoded;
	delete [] pszEncrypted;
	//delete [] pszEncrypted2;

	return 0;
}

My code is a c++ version of this code : http://www.codeproject.com/KB/web-security/Cryptography_MD5_TriDES.aspx?display=Print[^]

Please help me I really need this I did all what I can.

Thanks,
Jayjay

Re: Please help me with my decryption it almost works

CPallini5-Dec-08 11:08

CPallini

5-Dec-08 11:08

Actually your code is failing (at least) in the following line:

monsieur_jj wrote:
pszBase64Decoded = Base64Decode(psz3DESDecoded,_tcslen(psz3DESDecoded) * sizeof(TCHAR));

(CryptStringToBinary returns 0. BTW: are you using the debugger?). Moreover the following comparison

monsieur_jj wrote:
_tcscmp(pszBase64Decoded,szUnencrypted)

makes no sense, since szUnencrypted is a buffer never initialised.
Smile | :)

Re: Please help me with my decryption it almost works

monsieur_jj5-Dec-08 14:47

monsieur_jj

5-Dec-08 14:47

Hi Pallini,

Sorry never mind the message box output i forgot to comment that. Can anyone tell me the difference between the C# code and mine? Im pretty sure pkcs5 is the same at pkcs7 and i got all inputs the same.

Thanks,
Jayjay

Re: Please help me with my decryption it almost works

Luc Pattyn5-Dec-08 11:47

Luc Pattyn

5-Dec-08 11:47

Hi,

FWIW the encoded string is probably OK, since it decodes to
http://localhost:8080/MyWeb/managepoint/managepoint341.zip

it took 2 lines of C# code to get that. Not sure what is wrong in your code though.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Fixturized forever. Confused | :confused:

Re: Please help me with my decryption it almost works

Randor 5-Dec-08 21:10

Randor

5-Dec-08 21:10

Hi JayJay,

As I stated in this post[^] I suspect your default Microsoft cryptographic service provider does not support Triple ECB. I am only speculating as I have not spent much time researching this.

I suggest that you enumerate all supported algorithms on your development box. You can use the CryptEnumProviders Function[^] to see all the CSP. You can use the CryptEnumProviderTypes Function[^] to see all supported algorithms. If 3DES ECB is not listed then your CSP may not support it.

Example C Program: Enumerating CSP Providers and Provider Types[^]

You have spent a large amount of time trying to make this work with Microsoft API, perhaps you should begin looking at third party 3DES implementations. Here are a few I have found using Google.

http://www.codeguru.com/cpp/misc/misc/cryptoapi/print.php/c8195[^]

http://www.cs.auckland.ac.nz/~pgut001/cryptlib/[^]

Best Wishes,
-David Delaune

Re: Please help me with my decryption it almost works

monsieur_jj7-Dec-08 19:08

monsieur_jj

7-Dec-08 19:08

Hi David,

These are the list of what is supported:

Listing Available Providers:
Provider type   Provider Name
_____________   _____________________________________
        1       Gemplus GemSAFE Card CSP v1.0
        1       Infineon SICRYPT Base Smart Card CSP
        1       Microsoft Base Cryptographic Provider v1.0
       13       Microsoft Base DSS and Diffie-Hellman Cryptographic Provider
        3       Microsoft Base DSS Cryptographic Provider
       18       Microsoft DH SChannel Cryptographic Provider
        1       Microsoft Enhanced Cryptographic Provider v1.0
       13       Microsoft Enhanced DSS and Diffie-Hellman Cryptographic Provider

       24       Microsoft Enhanced RSA and AES Cryptographic Provider (Prototype
)
        5       Microsoft Exchange Cryptographic Provider v1.0
       12       Microsoft RSA SChannel Cryptographic Provider
        1       Microsoft Strong Cryptographic Provider
        1       Schlumberger Cryptographic Service Provider

Provider types and provider names have been listed.
Listing Available Provider Types:
Provider type   Provider Type Name
_____________   _____________________________________
        1       RSA Full (Signature and Key Exchange)
        3       DSS Signature
        5       Microsoft Office Outlook/Exchange Cryptographic Service Provider

       12       RSA SChannel
       13       DSS Signature with Diffie-Hellman Key Exchange
       18       Diffie-Hellman SChannel
       24       RSA Full and AES

I read at msdn that Microsoft Enhanced Cryptographic Provider v1.0 supports triple DES now I am confused to what the problem really is.

Thanks,
Jayjay

Static problem

NewVC++4-Dec-08 22:21

NewVC++

4-Dec-08 22:21

Hi All

How can i call of new dialog box on click of Static box?Plz help me

Re: Static problem

Iain Clarke, Warrior Programmer4-Dec-08 22:27

Iain Clarke, Warrior Programmer

4-Dec-08 22:27

1/ Make it a button, possibly with flat style. Then users will know it's a clickable thing.

2/ Set the SS_NOTIFY style, and your dialog will get messages that you've clicked on the static control.

3/ In the handler for that message, create a dialog any way you like.
eg:

CMyBabyDlg dlg (this)
dlg.DoModal ();

You might also want to look at a mutant static control turned into a hyperlink:
http://www.codeproject.com/KB/miscctrl/hyperlink.aspx[^]

(by Chris Maunder, so be nice about it)

Good luck,

Iain.

Re: Static problem

Jijo.Raj5-Dec-08 3:17

Jijo.Raj

5-Dec-08 3:17

1) Add a static text to your dialog via resource editor.
2) Change its ID from IDC_STATIC to something else. Such as

IDC_STATIC_DLG_LAUNCHER<br />

3) Now enable the "Notify" property of static control.
4) Now by using class wizard add click handler for the control.
5) In the newly added control handler, create and show your dialog.

basically for getting click notification from static controls, you've to change its default id from IDC_STATIC to something else and enabled the "Notify" property.

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

Re: Static problem

Hamid_RT5-Dec-08 6:33

Hamid_RT

5-Dec-08 6:33

We usually use of Button control but do you want to know about create dialog or load dialog?

how to find if the file is transferred [modified]

Dhiraj kumar Saini4-Dec-08 22:05

Dhiraj kumar Saini

4-Dec-08 22:05

Hello ,

I am sending a gif file to the HTTP Server.
Is there any way to find that the file is transfered successfully.
If yes how?

INTERNET_BUFFERS BufferIn = {0};
	DWORD dwBytesRead;
	DWORD dwBytesWritten;
	BYTE pBuffer[1024]; // Read from file in 1K chunks
	BOOL bRead, bRet;
	HANDLE hFile;




	HINTERNET hSession = InternetOpen(NULL,
                                      INTERNET_OPEN_TYPE_PRECONFIG,
                                      NULL,
                                      NULL,
                                      0);
    HINTERNET hConnection = InternetConnect(hSession, 
                                            _T("www.crmpanel.com"),  // Server
                                            INTERNET_DEFAULT_HTTP_PORT,
                                            NULL,     // Username
                                            NULL,     // Password
                                            INTERNET_SERVICE_HTTP,
                                            0,        // Synchronous
                                            NULL);    // No Context


	

     BufferIn.dwStructSize = sizeof( INTERNET_BUFFERS );

     HINTERNET hRequest = HttpOpenRequest(hConnection,
											_T("PUT"),
											_T("/temp"),
											NULL,
											NULL,
											NULL,
											0,
											0);
     if (!hRequest)
     {
       //printf("Failed to open request handle: %lu\n", GetLastError ());
		 MessageBox(_T("Failed to open request handle:"),NULL,MB_OK);
       return ;
     }



	 hFile = CreateFile (_T("c:\\Image1.gif"),
						GENERIC_READ,
						FILE_SHARE_READ,
						NULL,
						OPEN_EXISTING,
						FILE_ATTRIBUTE_NORMAL,
						NULL);

     if (hFile == INVALID_HANDLE_VALUE)
     {
      	    MessageBox(_T("Failed to open local file"),NULL,MB_OK);
       return ;
     }



     BufferIn.dwBufferTotal = GetFileSize(hFile, NULL);
	 MessageBox(_T("File size is"),NULL,MB_OK);
    
     if(!HttpSendRequestEx(hRequest, &BufferIn, NULL, HSR_INITIATE, 0))
     {
		 MessageBox(_T("Error on HttpSendRequestEx"),NULL,MB_OK);
				       return ;
     }


     DWORD sum = 0;
     do
     {
       if  (!(bRead = ReadFile (hFile, pBuffer, sizeof(pBuffer),
           &dwBytesRead, NULL)))
       {
		 MessageBox(_T("ReadFile failed on buffer"),NULL,MB_OK);
                 break;
       }
       if (!(bRet=InternetWriteFile( hRequest, pBuffer, dwBytesRead,
           &dwBytesWritten)))
       {
		 MessageBox(_T("InternetWriteFile failed"),NULL,MB_OK);
                  break;
       }
       sum += dwBytesWritten;
     }
     while (dwBytesRead == sizeof(pBuffer)) ;

     CloseHandle (hFile);
	 MessageBox(_T("Actual written bytes:"),NULL,MB_OK);
     
     if(!HttpEndRequest(hRequest, NULL, 0, 0))
     {
	   MessageBox(_T("Error on HttpEndRequest"),NULL,MB_OK);
             return ;
     }

	 
	 
	 return ;

Please help me.

Thanks In Advance

modified on Friday, December 5, 2008 5:52 AM

Re: how to find if the file is transferred

David Crow5-Dec-08 3:01

David Crow

5-Dec-08 3:01

Dhiraj kumar Saini wrote:
Is there any way to find that the file is transfered successfully.

If either if the if() conditions in the while() loop fail, you know the transfer was unsuccessful.

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

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Walk through html controls

Varghese Paul M4-Dec-08 21:28

Varghese Paul M

4-Dec-08 21:28

I am trying something like Spy++ for html documents to identify child window controls on the html page rendered by a browser. Is there a way I can programmatically access the common controls like button, edit window etc from a html page after the page got rendered in a browser like firefox, IE, Opera etc.

Thank you

cheers
Varghese Paul

Re: Walk through html controls

Rajesh R Subramanian4-Dec-08 21:46

Rajesh R Subramanian

4-Dec-08 21:46