C / C++ / MFC

2-Apr-14 0:21

SQL

When I run the debbuger, it show message like this:
"incompatible data type in criteria expression

"
Exactly in which line does show

By the naming convention

m_tabOnglet

looks like a member variable of a tabcontrol.

How to use ReadFile API Read HID Device synchronous

Re: DATABASE PROBLEM

David Crow2-Apr-14 17:27

David Crow

2-Apr-14 17:27

Using the debugger, what is the value of query?

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cedricvictor30-Mar-14 6:32

cedricvictor

30-Mar-14 6:32

Dear all:

I use ReadFile api to read HID device synchronous.

My code show as below:

C++

char preUsedSize = 0;
char curUsedSize = 0;

while(1)
{
    opening_HANDLE = TestHid.ReturnHandle();
    BOOL bGot = FALSE;
    Data64_t aData64;
    DWORD dwBytes = 0;
			

    BOOL bSus = ::ReadFile(opening_HANDLE, aData64.raw,    
                            sizeof(aData64), &dwBytes, NULL);
			
    if( bSus )
    {
        PTOUCH_REPORT inputData = (PTOUCH_REPORT)aData64.raw;
			
        curUsedSize = inputData->actualCnt;
	
        if(curUsedSize > preUsedSize)
	{
            for(int i = 0; i<(curUsedSize - preUsedSize);i++)
            {		      
                Beep(0x7fff, 500);
	    }					
       	}
	preUsedSize = curUsedSize;
					
        bGot = TRUE;		
    }
    else
    {
        CloseHandle(opening_HANDLE);       
    }
   
    if(!bGot)
    {				
     Sleep(500);
    }
}

My question is how do I clean preUsedSize and curUsedSize to 0,
If I did not get any data from my device(not get data failed)?

The FALSE of bSus means I get data from HID device fail, not no data income.

Thanks for your help, Victor.

Re: How to use ReadFile API Read HID Device synchronous

Richard Andrew x6431-Mar-14 10:13

Richard Andrew x64

31-Mar-14 10:13

Your question is not clear. It looks like you are asking how to set the variables preUsedSize and curUsedSize to zero.

To that, the answer is:

C++

preUsedSize = 0;
curUsedSize = 0;

The difficult we do right away...
...the impossible takes slightly longer.

Re: How to use ReadFile API Read HID Device synchronous

Heng Xiangzhong8-Apr-14 23:31

Heng Xiangzhong

8-Apr-14 23:31

I can't understand your question well.
Firstly, you read the file synchronous, so if no fails happens, it will be blocked here if no data income.

I think so, happy to communicate with you !

#imports for MS Office2013

Bryan Anslow28-Mar-14 10:08

Bryan Anslow

28-Mar-14 10:08

Hi All,
I have a wrapper class for the MS Office Products, last time I built it was way back for Office 2000.
I had a set of #imports for that version, but looking in the various directories seem to have changed a bit.
This is what I currently use, has anyone got an updated list for MS Office 2013?

Thanks,

<pre lang="vb">#import "C:\Program Files\Microsoft Office\Office\MSO9.DLL"
#import "C:\Program Files\Common Files\Microsoft Shared\VBA\VBA6\VBE6EXT.OLB"
#import "C:\Program Files\Microsoft Office\Office\MSWORD9.OLB" rename("ExitWindows","_ExitWindows")
//#import "C:\Program Files\Microsoft Office\Office\EXCEL9.OLB" rename("DialogBox","_DialogBox") \
//                                                              rename("RGB","_RGB") \
//                                                              exclude("IFont","IPicture")
//#import "C:\Program Files\Common Files\Microsoft Shared\DAO\DAO360.DLL" rename("EOF","EndOfFile")\
//                                                                        rename("BOF","BegOfFile")
//#import "C:\Program Files\Microsoft Office\Office\MSACC9.OLB"

SujayG1-Apr-14 22:26

1-Apr-14 22:26

I think if you generate files from a tlb the paths should automatically come up.

This is of Office 2010

#import "C:\\Program Files\\Common Files\\Microsoft Shared\\OFFICE12\\MSO.DLL" no_namespace

A suggestion : Having developed several Office addins, and if you are also doing so, I shall strongly suggest you to use C# .

Bryan Anslow2-Apr-14 4:23

Bryan Anslow

2-Apr-14 4:23

Hi Sujayg,

I am trying to create a *.lib file to wrap some of the Word Automation Functions.

So, tell me if I got this all wrong...

I created a Win32 project, selecting MFC and Static Library.

I used Add Class -> MFC Class From Typelib and selected File and used C:\\Program Files\\Microsoft Office\\Office15\\MSWORD.OLB

As I did not know which classes I would need, I just selected them all.

So it generated a lot of Class Header files.

I selected a few Header files for the classes I needed and added #includes for them.

The build created the msword.tlh file etc.

It also gave me over 100 errors, all due to missing items in the msword.tlh file.

In the Add Class step, should I just be selecting the MSWord classes I need, and not just all of them?

Or have I got this whole thing wrong?

It worked OK back in the days of Office 97 and 2000.

BTW, at this stage learning C# is not really an option.

Thanks,

Bryan.

SujayG3-Apr-14 1:04

3-Apr-14 1:04

The steps are correct and it worked fine in Office 2000. I had worked on Word automation in C++ / Office 2000 .

Yes, I could reproduce the errors. Probably we need to make some changes, for working on C++ / Office.

Have a look at [^] ; the steps in which the author makes a change to import. Also check the Word automation using C++ [^] - specially the Solution1.h/cpp and Solution1.h/cpp to view how imports are changed.

Let us know if it helps.

Sujay

Bryan Anslow3-Apr-14 5:02

Bryan Anslow

3-Apr-14 5:02

Hi Sujay,

Thanks for your invaluable information.

Interestingly, this link http://blogs.msdn.com/b/vsod/archive/2013/06/05/office-automation-through-vc-using-mfc-class-from-typelib-results-into-large-number-of-compilation-errors.aspx has a somewhat different approach.

So basically, we do no imports and just use the generated *.h files.

I am in the middle of trying it, but will not be able to do more until next week.

Bryan.

SujayG4-Apr-14 18:43

4-Apr-14 18:43

Hello Bryan

Thanks for sharing the link as well. I commented the import statement, and it worked fine.

I have checked the functionality of the classes though.

Thanks
Sujay

An algorithm question

econy26-Mar-14 15:53

econy

26-Mar-14 15:53

I have an application ,need to read hardware IO, each IO data be coded to an unsigned integer, 4 digits - 7 digits.
Quantity of all possible integers is 240, every integer is unique
for example:

1000,1002, 120008, 1318001,14702 , 4003...

After coding step, the coded integers need to be send out in a sequence.

12002 <- 4001 <- 10089 <- 5007 <- ...

Quantity of integers are limited to 128, but, the quantity number is not fixed. Perhaps send-cycle1 is 4 integers,
send-cycle2 is 120 integers,
send-cycle3 is 2 integers,
send-cycle4 is 0 integer.
...

And during cycle period, maybe there are duplicated data be read,but, sending sequence should not take duplicated data.

Logic is :

read data -> already in sequence, discard/ new data -> sequence

I wonder what data structure is good for the above logic and application.

Richard MacCutchan26-Mar-14 23:08

Richard MacCutchan

26-Mar-14 23:08

Use one of the STL containers such as hash_set[^] or set[^].

econy27-Mar-14 3:38

econy

27-Mar-14 3:38

MCU platform, use Hahset is not a good choice.

CPallini28-Mar-14 10:31

CPallini

28-Mar-14 10:31

In order to get better help you should detail your scenario. For instance, I have no idea of what you mean with

Quote:
After coding step, the coded integers need to be send out in a sequence.
12002 <- 4001 <- 10089 <- 5007 <- ...

Veni, vidi, vici.

econy31-Mar-14 4:12

econy

31-Mar-14 4:12

Sorry, I mean, I want to send 12007, then 5007, right number after left number.

chaau1-Apr-14 17:17

chaau

1-Apr-14 17:17

Is it a LIFO pattern? In this case std::stack[^] is your answer

Receive UDP packet from multiple default gateway

Stefan_Lang3-Apr-14 3:29

Stefan_Lang

3-Apr-14 3:29

econy wrote:
I wonder what data structure is good for the above logic and application.

The problem in this question is that you didn't actually tell us a lot about the logic and application. You only told us about the scope of input values, and that these values are gathered in batches and processed (filtering out duplicates) before sending out.

You didn't tell us if anything of this is time-critical, or you're working with restricted amounts of memory - should we try to optimize for either?

Also, is it more important for the receiver to receive the data in a timely manner, requiring on-the-fly processing so you can send out the batch right after the end of the cycle - or can you afford to delay the processing until after receiving the last input of the cycle, before sending it out?

The answer to these questions will influence what algorithm to use, and the algorithm will influence what data structures to use.

GOTOs are a bit like wire coat hangers: they tend to breed in the darkness, such that where there once were few, eventually there are many, and the program's architecture collapses beneath them. (Fran Poretto)

Point in case: http://www.infoq.com/news/2014/02/apple_gotofail_lessons[^]

Shanky426-Mar-14 5:18

Re: Receive UDP packet from multiple default gateway

26-Mar-14 5:18

CSS

Hi,

I am writing an application to receive a data from adapter. Adapter is brodcasting UDP data.
So in my case I have two adapter which is connected to same router having following IP information -
1. Adapter 1 :-
   IP                   : 192.168.1.32
   Default Gateway  : 192.168.1.1
   Subnet Mask      : 255.255.255.0
2. Adapter 2 :-
   IP                   : 192.168.4.33
   Default Gateway  : 192.168.4.1
   Subnet Mask      : 255.255.255.0

Here is the router detail :

Default Gateway     : 192.168.1.1
Subnet Mask             : 255.255.255.0

PC is also connected to same router.
Application written in C++ is configure to receive data from any IP address.
m_nFamily           = AF_INET;
m_nType         = SOCK_DGRAM;
m_nProtocol         = IPPROTO_UDP;
m_SockAddr.sin_addr.s_addr  = INADDR_ANY;
m_SockAddr.sin_family   = AF_INET;

In my case I can receive data coming from Adapter 1 but can not receive data coming from Adapter 2.
But the data coming from both the adapter I can see in Wireshark.

Work around to receive data from Adapter 2 :  To receive data from adapter 2, I need to change the wireless network connection property for IPV4 and need to change "obtain IP address automatically" to "Use the following address":
Used following data to configure manually :
   IP                   : 192.168.4.31
   Default Gateway  : 192.168.4.1
   Subnet Mask      : 255.255.255.0

But after doing this application don't see the message coming from adapter 1.
But the data from both the adapter can be seen in wireshark.

My goal is to receive data from both the adapter simultaneously.

Richard MacCutchan26-Mar-14 5:32

Richard MacCutchan

26-Mar-14 5:32

Have you tried binding your socket to the specific IP addresses?

Re: Receive UDP packet from multiple default gateway

Shanky426-Mar-14 6:55

Re: Receive UDP packet from multiple default gateway

26-Mar-14 6:55

Thanks for going through it.
I did not try to bind the socket with specific IP address.
Also this is not a requirement for me. I will give a try just to verify if it is possible but my intention is to receive data from all the adapter connected to same netwoek(router). Earlier I am using DHCP so that time it was not a problem for me cause all the adapter was getting the same default gateway but now I am switching to static where user can put any IP address with different default gateway.

Shanky426-Mar-14 7:05

Re: Receive UDP packet from multiple default gateway

26-Mar-14 7:05

Also as I can see the data in wireshark, looks like PC is receiving this data but it is not reaching to application

Richard MacCutchan26-Mar-14 7:14

Richard MacCutchan

26-Mar-14 7:14

You will receive messages on the socket that you have created, which will bind to the first adapter. If you wish to receive on both then you need two sockets one bound to each IP address.

Re: Receive UDP packet from multiple default gateway

Jochen Arndt26-Mar-14 7:17

Jochen Arndt

26-Mar-14 7:17

You may use the SOCK_RAW type to get all packets and not only those that match the network mask of your adapter. Maybe this CP article is helpful: A Little Sniffer that Uses WSA Sockets (Windows Sockets)[^].

Re: Receive UDP packet from multiple default gateway

Shanky426-Mar-14 7:29