C / C++ / MFC Discussion Boards

Re: apostrophe or single quote causes problem in query

toxcct8-Jan-08 6:06

8-Jan-08 6:06

in SQL, you must type a double simple quote if within a string...
CString csVendorName = _T("Matt''s Hobby Shop");

but the best is ever to use Parametrized Queries...

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Re: apostrophe or single quote causes problem in query

David Crow8-Jan-08 6:11

David Crow

8-Jan-08 6:11

littleGreenDude wrote:
CString csVendorName = _T("Matt's Hobby Shop");

How about:

CString csVendorName = _T("Matt''s Hobby Shop");

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

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

How do I determine the Com Port number of a serial port emulating device?

arnold_w8-Jan-08 5:14

arnold_w

8-Jan-08 5:14

I have a barcode scanner which can emulate a Com Port (i.e. in the Device Manager it appears as a Com Port and I can communicate to it via HyperTerminal). How can I programmatically determine which Com Port (COM1, COM2, COM3, ..., etc) has been assigned to my scanner? If I look in the Device Manager there is some additional information available:

Metrologic USB Scanner (COM4)

Can I retrieve this additional descriptive information somehow from my C++ application? Thanks you in advance for any help.

Re: How do I determine the Com Port number of a serial port emulating device?

Member 7549608-Jan-08 18:01

Member 754960

8-Jan-08 18:01

The way to do this is to scan the available serial ports and then send a command to the deivce or something that will produce a known response. When you get the response, you have the device. Check if the Mfg. gives you a SDK to work with or they update the registry with useful information. Check the CP projects for a serial port scanner. I think Paul Discalia (sp?) did one a long time ago.

Re: How do I determine the Com Port number of a serial port emulating device?

arnold_w9-Jan-08 1:29

arnold_w

9-Jan-08 1:29

Thanks for your suggestion. I was unable to locate the serial port example by Paul, but I found another example that does exactly what I would like to do:

http://www.naughter.com/enumser.html[^]

The function CEnumerateSerial::UsingSetupAPI2 reads the entries in the Device Manager so I get the descriptive name of my barcode scanner and can thus locate the correct com port without having to actually communicate over it.

Re: How do I determine the Com Port number of a serial port emulating device?

Member 7549609-Jan-08 3:44

Member 754960

9-Jan-08 3:44

PJ Naughter is the guy I was thinking of, not Paul.

Sorry about that.

GDI Resource Manager

Rob Caldecott8-Jan-08 5:04

Rob Caldecott

8-Jan-08 5:04

I have an application which allows users to create documents that could potentially contain a lot of fonts, brushes and pens. In order to keep GDI handle usage to a minimum I was planning to implement some form of shared GDI object pool (as many of the GDI objects used by these documents will be the same) but before I did I thought it worth asking if anyone here has come across anything similar before. I am using MFC FWIW.

Thanks in advance.

Re: GDI Resource Manager

led mike8-Jan-08 7:34

led mike

8-Jan-08 7:34

Rob Caldecott wrote:
asking if anyone here has come across anything similar before

Yes I have implemented and seen libraries for object pools. I believe they are fairly common. In fact there is C++ template based article for one here on code project which one finds with a simple Google search[^].

virtual function MeasureItem problem(owner draw function problem)

fantasy12158-Jan-08 4:00

fantasy1215

8-Jan-08 4:00

I derived my class from CListBox called CMyListBox.
then I write the virtual function MeasureItem to change the height of items.
In my main dialog CMyDialog, construct a CMyListBox object.
CMyListBox m_ctlBox;

and in the CMyDialog::OnInitDialog

<br />
DDX_Control(pDX, BOXID, m_ctlBox);<br />
CMyDialog::OnInitDialog()<br />
{<br />
    m_ctlBox.ModifyStyle(0, LBS_OWNERDRAWFIXED);<br />
}<br />

but it has no affect. The height doesn't change at all. But it executes fine.

Then I've tried comment the code m_ctlBox.ModifyStyle(0, LBS_OWNERDRAWFIXED);
And in the resource editor, I change the property of the ListBox with OwnerDraw to OwnerDrawFixed, then I got compilation assertion error.

What do I miss? And Why do I get the assertion error?But I don't want to create the CMyListBox on the fly at all, cause If I create it on the fly, I can't adjust its position and size.

And in the book «Programming with MFC 2nd», I program as the book shows, it works fine.
First, in the CMyListBox use the PreCreateWindowClass to add the style with LBS_OWNERDRAWFIXED OR LBS_OWNERDRAWVARIABLE.
Second, in the virtual MeasureItem function to change the height.
Third, But you should in the CMyDialog::OnInitDialog to create the CMyListBox on the fly, it should use CMyListBox.Create to create the ListBox, otherwise the CMyListBox::PreCreateWindowClass would not be called to initialize the style with LBS_OWNERDRAWFIXED.

Re: virtual function MeasureItem problem(owner draw function problem)

Mike O'Neill10-Jan-08 13:31

Mike O'Neill

10-Jan-08 13:31

The proper place to do all this is inside your override of the PreSubclassWindow() function.

This function is called regardless of whether the control is created dynamically with a call to Create(), or on-the-fly with a dialog resource template and subclassed with the DDX_Control functions.

See http://www.flounder.com/presubclasswindow.htm[^]

sizeof char* array

Programm3r8-Jan-08 3:54

Programm3r

8-Jan-08 3:54

Hi all,

A simple question, although I do not know the answer, but how can I get the size of a char* array.
I have tried the following:

char* array[2] = {"!5","C2"};
sizeof(array)
// DEBUG RESULT // 
sizeof(array) 8 (0x00000008)

Can anyone please help?
Thanks in advance
Regards,

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

Re: sizeof char* array

toxcct8-Jan-08 4:00

toxcct

8-Jan-08 4:00

you cannot. you have to maintain a counter variable to know the current number of elements in your array, if its size is not constant...

doing a sizeof(array) will do nothing but returning you the size of the variable array, which is of type char**; and as long as a pointer is 8 bytes long... sizeof(array) returns 8.

If you were using C++, you could have used std::vector<std::string> for instance, but AFAIK, you're using C only...

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Re: sizeof char* array

Programm3r8-Jan-08 4:09

Programm3r

8-Jan-08 4:09

toxcct, thanks for the response, I don't want to be forward but how would one then do it using std::vector<std::string> (if I may be so bold ...)

Thanks again ...

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

Re: sizeof char* array

toxcct8-Jan-08 4:28

toxcct

8-Jan-08 4:28

those 2 classes are part of the Standard Template Library (better known as STL).

in your case, it would be very easy to use :

std::vector<std::string> array;
array.add("Hello");
array.add("World");
 
size_t n = array.size();

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Re: sizeof char* array

Programm3r8-Jan-08 4:32

Programm3r

8-Jan-08 4:32

Thank you very much Smile | :)

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

Re: sizeof char* array

David Crow8-Jan-08 4:56

David Crow

8-Jan-08 4:56

Programm3r wrote:
(if I may be so bold ...)

Why is asking a legitimate question considered being bold? Confused | :confused:

Re: sizeof char* array

CPallini8-Jan-08 5:00

CPallini

8-Jan-08 5:00

I think he refers to the daunting design challenge of using STL.
Big Grin | :-D

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.

[my articles]

Re: sizeof char* array

C^hris L^osinger8-Jan-08 4:02

C^hris L^osinger

8-Jan-08 4:02

in general, you can't. C/C++ doesn't keep track of array dimensions. at best, you can get the size of a 1D array like this:

#define _ARRAYSIZE(__a)        (sizeof(__a)/sizeof(__a[0]))
int array[5] = {0,1,2,3,4};
int s = _ARRAYSIZE(array);
... s = 5

but that only works if the array is declared in the same scope - it won't work if you just have a pointer to the array.

use the STL's collections.

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Re: sizeof char* array

Programm3r8-Jan-08 4:12

Programm3r

8-Jan-08 4:12

Thanks for the response Chris, I'll give it a try.

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My Blog: ^_^

Re: sizeof char* array

CPallini8-Jan-08 4:13

CPallini

8-Jan-08 4:13

Programm3r wrote:
A simple question, although I do not know the answer, but how can I get the size of a char* array.

Do you really need the size of the array or the number of its elements?
The compiler is, of course, answering correctly to your request: it returns 8 because your array contains two char * and each pointer size is 4 (on a 32-bit system).
If you want to know how many elements the array has, then use, as suggested
by Chris Losinger [^]

sizeof(array)/sizeof(array[0]);

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.

[my articles]

Re: sizeof char* array

Programm3r8-Jan-08 4:18

Programm3r

8-Jan-08 4:18

Thanks for the response CPallini.

CPallini wrote:
Do you really need the size of the array or the number of its elements?

Yes, size of the array or the number of its elements.

CPallini wrote:
If you want to know how many elements the array has, then use, as suggested
by Chris Losinger [^]

Thanks

Regards,

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

LsaLogonUser() + MSV1_0_LM20_LOGON

choupani8-Jan-08 3:49

choupani

8-Jan-08 3:49

I'm developing a firewall that authenticate users with ntlm against Active Directory.
My ntlm secnario is complete and work truly but my LsaLogonUser has problem.
When I pass NTLM Challenge,User Name,Lan Manager Response, NTLM Response,WorkStation Name, Domain Name to MSV1_0_LM20_LOGON structure and pass it to LsaLogonUser
function, LsaLogonUser return error,
Dose anybody have a sample or code that can help me?

My code is here:
UNICODE_STRING TempString;
UNICODE_STRING TempString2;
PMSV1_0_LM20_LOGON Auth;
PCHAR Auth1[40*5]; /* lots o' space */
PUCHAR Strings;

Auth = (PMSV1_0_LM20_LOGON) Auth1;
Strings = (PUCHAR)(Auth + 1);
Auth->MessageType = MsV1_0Lm20Logon;
RtlMoveMemory( Auth->ChallengeToClient,challenge,MSV1_0_CHALLENGE_LENGTH );
RtlInitUnicodeString( &TempString, L"Administrator" );
NlpPutString( &Auth->UserName, &TempString, &Strings );
RtlInitUnicodeString( &TempString, L"TOSHIBA" );
NlpPutString( &Auth->Workstation, &TempString, &Strings );
Auth->CaseSensitiveChallengeResponse.Length = 0;
Auth->CaseSensitiveChallengeResponse.MaximumLength = 0;
Auth->CaseSensitiveChallengeResponse.Buffer = NULL;
TempString2.Buffer = (PWSTR)lmPassword;
TempString2.Length = (USHORT)cbLmResp;
TempString2.MaximumLength = TempString2.Length;
if( TempString2.Length > 24 ) {
TempString2.Length = 24;
}
NlpPutString((PUNICODE_STRING)&Auth->CaseInsensitiveChallengeResponse,(PUNICODE_STRING)&TempString2,&Strings);
RtlInitUnicodeString( &TempString, L"KHARAZM.SERVER" );
NlpPutString( &Auth->LogonDomainName, &TempString, &Strings );
UNICODE_STRING OrgnName;
RtlInitUnicodeString( &OrgnName, L"TOSHIBA" );
ULONG ProfileBufferSize;
sysLog("Len=%d",Strings - (PUCHAR)Auth);

Status = LsaLogonUser(
gLsaHandle,
(PSTRING)&OrgnName,
Network,
gAuthPackageId,
// LATER? AuthenticationPackage | LSA_CALL_LICENSE_SERVER,
Auth,
Strings - (PUCHAR)Auth,
NULL,
&SourceContext,
(PVOID *)&pProfileBuffer,
&ProfileBufferSize,
&LogonLuid,
pLogonToken,
&Quotas,
&SubStatus );

Re: LsaLogonUser() + MSV1_0_LM20_LOGON

Rajesh R Subramanian8-Jan-08 21:44

Rajesh R Subramanian

8-Jan-08 21:44

What is the error that LsaLogonUser() is returning?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
...formerly known as brahmma
Codeproject.com: Visual C++ MVP

Re: LsaLogonUser() + MSV1_0_LM20_LOGON

choupani8-Jan-08 21:51

choupani

8-Jan-08 21:51

It's return -1073741715 means Invalid Username/Password.
My code is here:
//////////////////////////////////////////////////////////////////////////
UNICODE_STRING TempString;
UNICODE_STRING TempString2;
PMSV1_0_LM20_LOGON Auth;
PCHAR Auth1[40*5]; /* lots o' space */
PUCHAR Strings;

Auth = (PMSV1_0_LM20_LOGON) Auth1;
Strings = (PUCHAR)(Auth + 1);
Auth->MessageType = MsV1_0Lm20Logon;
RtlMoveMemory( Auth->ChallengeToClient,challenge,MSV1_0_CHALLENGE_LENGTH );
RtlInitUnicodeString( &TempString, L"Administrator" );
NlpPutString( &Auth->UserName, &TempString, &Strings );
RtlInitUnicodeString( &TempString, L"TOSHIBA" );
NlpPutString( &Auth->Workstation, &TempString, &Strings );
Auth->CaseSensitiveChallengeResponse.Length = 0;
Auth->CaseSensitiveChallengeResponse.MaximumLength = 0;
Auth->CaseSensitiveChallengeResponse.Buffer = NULL;
TempString2.Buffer = (PWSTR)lmPassword;
TempString2.Length = (USHORT)cbLmResp;
TempString2.MaximumLength = TempString2.Length;
if( TempString2.Length > 24 ) {
TempString2.Length = 24;
}
NlpPutString((PUNICODE_STRING)&Auth->CaseInsensitiveChallengeResponse,(PUNICODE_STRING)&TempString2,&Strings);

RtlInitUnicodeString( &TempString, L"KHARAZM.SERVER" );
NlpPutString( &Auth->LogonDomainName, &TempString, &Strings );
UNICODE_STRING OrgnName;
RtlInitUnicodeString( &OrgnName, L"TOSHIBA" );
ULONG ProfileBufferSize;
sysLog("Len=%d",Strings - (PUCHAR)Auth);

Status = LsaLogonUser(
gLsaHandle,
(PSTRING)&OrgnName,
Network,
gAuthPackageId,
// LATER? AuthenticationPackage | LSA_CALL_LICENSE_SERVER,
Auth,
Strings - (PUCHAR)Auth,
NULL,
&SourceContext,
(PVOID *)&pProfileBuffer,
&ProfileBufferSize,
&LogonLuid,
pLogonToken,
&Quotas,
&SubStatus );
//////////////////////////////////////////////////////////////////////////

Re: LsaLogonUser() + MSV1_0_LM20_LOGON

Rajesh R Subramanian8-Jan-08 22:02

Rajesh R Subramanian

8-Jan-08 22:02

Member 405269 wrote:
means Invalid Username/Password.

So, isn't that error message clear enough?

On an additional note:
Please don't post code unless you're asked to. And instead of copy pasting the entire function, post the code that is relevant to the problem. I suggest that while posting code, please enclose it within the <pre> </pre> tags.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
...formerly known as brahmma
Codeproject.com: Visual C++ MVP

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