C / C++ / MFC Discussion Boards

Re: source code

Richard MacCutchan2-Apr-13 9:19

Richard MacCutchan

2-Apr-13 9:19

raj suthar wrote:
i want code

Then you have a few choices:

Search Google for samples.
Search CodeProject articles.
Write it yourself.
Pay someone else to write it for you.
...

Use the best guess

Re: source code

Captain Price2-Apr-13 17:02

Captain Price

2-Apr-13 17:02

maybe github and sourceforge.... will help

Pravinda
the Magician

Re: source code

David Crow2-Apr-13 10:34

David Crow

2-Apr-13 10:34

What code have you put together so far?

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Re: source code

Peter_in_27802-Apr-13 10:57

Peter_in_2780

2-Apr-13 10:57

You forgot the 'joke' icon.

Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012

Re: source code

Captain Price2-Apr-13 17:04

Captain Price

2-Apr-13 17:04

maybe you too Confused | :confused:

Pravinda
the Magician

Re: source code

Erudite_Eric3-Apr-13 3:38

Erudite_Eric

3-Apr-13 3:38

He got as far as opening a new cpp file....

==============================

Nothing to say.

ICredentialProviderFilter

venkatesh528672-Apr-13 1:59

venkatesh52867

2-Apr-13 1:59

hi
i was implemented ICredentialProviderFilter in my custom credential provider it is switch user button not showing. ie: it is showing only my custom credential provider it is not showing my other credentials please help me anyone

Testing my first C driver

candogu2-Apr-13 1:44

candogu

2-Apr-13 1:44

Hi, I have a C file which contains a simple DbgPrint in DriverEntry but, when I build my project, I get 9 errors like C:\drvtest\src\testdriver.c : error CS2059: Syntax Error : ';'
C:\drvtest\src\testdriver.c : error CS2059: Syntax Error : 'type'
C:\drvtest\src\testdriver.c : error CS2059: Syntax Error : identifier DriverDispatch

I use WDK and CodeBlocks as a C compiler.

What is the problem? Please help. Thanks.

Re: Testing my first C driver

Richard MacCutchan2-Apr-13 1:53

Richard MacCutchan

2-Apr-13 1:53

Without seeing the actual code it is not easy to guess why you are seeing these syntax errors.

Use the best guess

Re: Testing my first C driver

candogu2-Apr-13 1:58

candogu

2-Apr-13 1:58

My code is below;

#include "ntddk.h"

NTSTATUS STDCALL DriverDispatch(IN PEDEVICE_OBJECT DeviceObject, IN PIRP Irp)
{
return STATUS_SUCCESS;
}

VOID STDCALL DriverUnload(IN PDRIVER_OBJECT DriverObject)
{
DbgPrint("Driver_Unload");
}

NTSTATUS STDCALL DriverEntry(IN PDRIVER_OBJECT DriverObject, IN PUNICODE_STRING RegisterPath)
{
DbgPrint("Driver_Entry");
DriverObject->DriverUnload=DriverUnload;
return STATUS_SUCCESS;
}

Thanks.

Re: Testing my first C driver

Richard MacCutchan2-Apr-13 2:16

Richard MacCutchan

2-Apr-13 2:16

Which line gives the error?

Use the best guess

Re: Testing my first C driver

candogu2-Apr-13 2:22

candogu

2-Apr-13 2:22

When I build the file, all the lines gives error. I think configuration files have errors. SOURCES and MAKEFILE. Thanks for your replies.

Re: Testing my first C driver

Richard MacCutchan2-Apr-13 2:30

Richard MacCutchan

2-Apr-13 2:30

Sorry, I have no idea what that means, but I suspect you are missing some essential component in your build configuration.

Use the best guess

Re: Testing my first C driver

Erudite_Eric3-Apr-13 0:46

Erudite_Eric

3-Apr-13 0:46

So show us the SOURCES file.

==============================

Nothing to say.

Re: Testing my first C driver

Jochen Arndt2-Apr-13 3:05

Jochen Arndt

2-Apr-13 3:05

I'm not sure if this helps. But you may try (for all functions):

// Function declaration with STDCALL calling convention
NTSTATUS STDCALL DriverDispatch(IN PEDEVICE_OBJECT DeviceObject, IN PIRP Irp);

// Function definition without calling convention
NTSTATUS DriverDispatch(IN PEDEVICE_OBJECT DeviceObject, IN PIRP Irp)
{
    return STATUS_SUCCESS;
}

Re: Testing my first C driver

Erudite_Eric3-Apr-13 3:34

Erudite_Eric

3-Apr-13 3:34

No, you dont want to mess with that, leave the compiler do its thing.

==============================

Nothing to say.

Re: Testing my first C driver

David Crow2-Apr-13 4:34

David Crow

2-Apr-13 4:34

Have you included windows.h (or equivalent)?

Have you tried commenting out statements until the compiler errors go away, and then introduce them back one by one until the compiler errors show up?

Re: Testing my first C driver

Erudite_Eric3-Apr-13 0:45

Erudite_Eric

3-Apr-13 0:45

DavidCrow wrote:
Have you included windows.h?

In a driver? He needs wdm.h unles he is building an NT4 style driver.

==============================

Nothing to say.

Re: Testing my first C driver

Erudite_Eric3-Apr-13 0:58

Erudite_Eric

3-Apr-13 0:58

Good job you cant build it because it will BSOD anyway.

You need to do this for starters in DriverEntry:

C++

for (Index = 0 ; Index <= IRP_MJ_MAXIMUM_FUNCTION ; Index++)
{
    DriverObject->MajorFunction[Index] = MyDispatch;
}

DriverObject->DriverExtension->AddDevice            = 0; // non PnP so dont set this

DriverObject->DriverUnload                          = MyUnload;

Your MyDispatch actually needs to do something with the Irps, set Information to 0, the status block to success and return success.

C++

Irp->IoStatus.Status     = STATUS_SUCCESS;
Irp->IoStatus.Information    = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_SUCCESS;

You then need to make sure you are using the DDK (of WDK) compiler, as in actually install the entire DDK (WDK). I dont know what CodeBlocks is, I dont care, the DDK compiler is the one you must use.

You need to get your SORCES file right, look at some of the samples that ship with the DDK (WDK).

You then need a service entry in the registry in order to start your driver, either inf file or do it manually, then start it with 'net srart'.

==============================

Nothing to say.

code conversion MATLAB to c

Member 99587781-Apr-13 21:12

Member 9958778

1-Apr-13 21:12

Hi all I want to convert the following code of MATLAB in c can any expert can help me?
thanks in advance

%ICA START//
data1=[a;b;c];
MEANMAT=repmat(mean(data1')',1,length(data1));
c1=cov(data1');
[T1,E1]=eig(c1);
data2=T1'*(data1-MEANMAT);
%data2=T1*(data1);
c2=cov(data2');
[T2,E2]=eig(c2);
data=E2^(-1/2)*data2;
T=E2^(-1/2)*T1;
c=cov(data');//

Re: code conversion MATLAB to c

C^hris L^osinger2-Apr-13 7:49

C^hris L^osinger

2-Apr-13 7:49

what does that Matlab code do?

image processing toolkits | batch image processing

Accessing Win32 APIs from WinRT app through Win32 Dll

msr_codeproject1-Apr-13 4:21

msr_codeproject

1-Apr-13 4:21

Hi, I am trying to call Win32 API from Windows Store App. Since Win32 APIs can not be accessed from WinRT, I have written a Win32 Dll and exposed a function.

I am trying to call this function from WinRT App. But I am getting 'Access Denied' Error.

Dll Code:

C++

extern "C" __declspec( dllexport )INT32 ScanWlan()
{
// Declare and initialize variables.

HANDLE hClient = NULL;
DWORD dwError = ERROR_SUCCESS;

DWORD dwMaxClient = 2;  
DWORD dwCurVersion = 0;
DWORD dwResult = 0;

dwResult = WlanOpenHandle(dwMaxClient, NULL, &dwCurVersion, &hClient);
if (dwResult != ERROR_SUCCESS) 
{
 WlanCloseHandle(hClient, NULL);
 wprintf(L"WlanOpenHandle failed with error: %u\n", dwResult);
 return 1;
}

I am able to call this funtion from WinRT App. But 'WlanOpenHandle' function failed with error 5 (ERROR_ACCESS_DENIED).

I have done this using administrator login also. But still I am getting the same error.

Am I doing the right thing?

Can We access Win32 APIs from WinRT Apps through Dlls (at least).

Any help?

Thank you,

Sai

Re: Accessing Win32 APIs from WinRT app through Win32 Dll

Richard MacCutchan1-Apr-13 21:37

Richard MacCutchan

1-Apr-13 21:37

The value in dwMaxClient is incorrect. It should be a composite value constructed with the WLAN_API_MAKE_VERSION() macro, as described in the documentation[^].

Use the best guess

Re: Accessing Win32 APIs from WinRT app through Win32 Dll

msr_codeproject1-Apr-13 23:17

msr_codeproject

1-Apr-13 23:17

Hi Richard MacCutchan, thank you for your reply.

I changed my code like this.

dwResult = WlanOpenHandle(WLAN_API_MAKE_VERSION(2, 0), NULL, &dwCurVersion, &hClient);

But still its throwing the same error.

Basically I'm trying to find Wi-Fi n/w interfaces and trying to get available Wi-Fi access points.

If I run this code from a pure Win32 application, I am able to get the interfaces and Wi-Fi access points.
But not working from WinRT App.

Regards
Sai

Re: Accessing Win32 APIs from WinRT app through Win32 Dll

MicroVirus1-Apr-13 23:43

MicroVirus

1-Apr-13 23:43

If you use a DLL, that DLL is loaded into your WinRT process space and shares the same security context as the WinRT apps. In other words, you cannot 'escape the sandbox' via a DLL.
Unfortunately, I have no experience with programming WinRT, so I can not present you with a solution, only an answer as to why this will not work.

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