|
what is he unresoleved external sybal. I meant which function is unresolved ?
|
|
|
|
|
I want to use the timeSetEvent in the C++/CLI for a 1msec timing resolution.
I seem to have a problem in the CALLBACK function and when i try to replace it with a delegate i have other problems.
Can anyone show me the way to use timeSetEvent with a CALLBACK/Delegate function that actually work?
|
|
|
|
|
SampleForm::SampleForm()
{
InitForm();
}
void SampleForm::InitForm()
{
Timer* timer1;
timer1 = new Timer();
timer1->Interval = 3000; // 3 seconds resolution
timer1->add_Tick(new EventHandler(this,OnTimer));
timer1->Start();
}
void SampleForm::OnTimer(System::Object* obj,System::EventArgs* ea) //declare as static method in .h file
{
}
^-^
@|@
- redCat
|
|
|
|
|
this is now the timeSetEvent, but the Timer class.
The Timer class accuracy is very poor, unlike the timeSetEvent.
Can anybody show me how to use it in c++/cli .net 2005?
|
|
|
|
|
First of all, you should note that accuracy is not the same as precision[^]. 10ms is pretty much the most accurate you can get with Win32, without screwing with the operating system metrics or reinstalling the HAL.
But anyway, you use timeSetEvent in C++/CLI the same way you use it in Win32.
#include <windows.h>
#pragma comment(lib, "winmm")
public ref class TimerWrapper
{
EventHandle ^eventHandle;
public:
TimerWrapper()
: eventHandle(false, EventResetMode::AutoReset)
{
}
int TimerFunc()
{
for( ; ; )
{
eventHandle->WaitOne();
...
}
}
void UseTimeEvent()
{
timeSetEvent(100, 55, reinterpret_cast<LPTIMECALLBACK>(
eventHandle->SafeWaitHandle->DangerousWaitHandle().ToPointer()),
0, TIME_ONESHOT | TIME_CALLBACK_EVENT_SET);
...
}
};
-- modified at 17:31 Saturday 13th May, 2006
|
|
|
|
|
can anyone tell me how do i get the current directory in VC++ managed code?
|
|
|
|
|
String^ strCurDir = System::IO::Directory::GetCurrentDirectory();
cheers...mil10.
|
|
|
|
|
This is a C++/CLI forum. So it is asumed that all questions will be related to Managed platform. Anyway your post will be helpful for him, if he need the answer in Win32.
rgds...milton.
|
|
|
|
|
I have just recently started Computer Science as my major in college. I love playing online games and many people that I know program games online. I am using Dev-C++ as well as VB 6. My question is does anyone know where i can start on programming a videogame online.I have an encryption for a game I am curious on how to get and encryption and how to input it into text in C++ to build the game and the proxy.
Thanks
|
|
|
|
|
I am trying to use http: to retrieve a web site in html into a buffer in memory.
My code is as follows:
int Socket = clientSock(url.c_str(), 80);
if (send(Socket, (char*)str.c_str(), str.size(), 0) == SOCKET_ERROR)
{
//throw an error exception
}
Sleep(1000);
char buf[500];
int sizeOfBuf = sizeof(buf);
int bytes_read = 0;
int total_bytes_read = 0;
do
{
bytes_read = recv(Socket, buf, sizeOfBuf, 0);
myStrBuffer += RCString(buf);
total_bytes_read+=bytes_read;
memset(buf, 0, sizeof(buf));
}
while (bytes_read != 0);
where url is the host (ie "www.bbc.co.uk")
page is the relative url (ie "/sport/football")
However I cannot rerieve the information required... what i actually get is
"HTTP/1.1 400 Bad Request".
can anyone help me as to why this is happening as well as how to fix it.
Also i need to retrieve a web site with parameters
''[^]'
where 'epp.eurostat.cec.eu.int' is the host and '/portal/page' is the relative url. and everything else is a parameter list and i am unsure of how to do this.
any help would be greatly appreciated
cheers
anthony
|
|
|
|
|
Anthony Moss wrote: "HTTP/1.1 400 Bad Request".
your request was bad but you did not post your request so how can we help? Did I miss something?
led mike
|
|
|
|
|
I am building a managed C++ wrapper DLL around an unmanaged C++ DLL that uses MFC CStrings in its public interface. The unmanaged C++ DLL contains a class that I need to access. My problem is that this class contains methods using CString references, such as:
void SetName(const CString& name);
How can I call this method from my managed C++ code?
I have tried this in my wrapper code:
void CMfcDllWrapper::SetName(System::String^ str)
{
CString s(str);
m_pUnmanaged->SetName(s);
}
where m_pUnmanaged points to the C++ object in the unmanaged DLL. However, this approach causes a linker error, so I am not using the correct signature for a CString reference.
An a similar example where the CString is passed by value everything works, but with pass by reference I am stuck.
PS: I am using VS2005
Can anyone give some advise , please?
Thanks
Bo
|
|
|
|
|
CString has char* overloads. So you can try the following.
void CMfcDllWrapper::SetName(System::String^ str)<br />
{<br />
<br />
char __nogc* szStr = static_cast<char *>(Marshal::StringToHGlobalAnsi (str).ToPointer());<br />
m_pUnmanaged->SetName(szStr); <br />
Marshal::FreeHGlobal( IntPtr((void*)szStr) );<br />
<br />
}
cheers..mil10
|
|
|
|
|
can anyone tell me how do we add a dll to our project?
|
|
|
|
|
Hi,
i guess you were talking about a managed c++ dll and you would like to add it to a clr project in VS2005.
If so, then you'll have to do the following:
1. go to "Project->References", click on "Add Reference"
2. Browse to your dll and add it
3. reference the namespace of your dll
e.g.
<br />
using namespace MyDllNamespace;<br />
using namespace MyDllNamespace::Net;<br />
...<br />
regards Tobias 
|
|
|
|
|
In addition to Tobias' info, you can also use #using instead of using "Add Reference" in the Project Properties:
Example:
#using <System.Data.dll>
|
|
|
|
|
Hi All
When a client using shared data from remote machine.It is very fast .But with server for same it is taking more time.
The packet transmission is 300 per share data and for server 1500 as per net stat result.
As my packet size is small i disable nagle algorithm also.but not satisfied result.So Please give some guidance.
Regards
Sabita
|
|
|
|
|
This is the first time I write a program after learning C++ for 1 week ago.
I use Dev-C++ and I want my program to do function such as:
Ask person to type two number : 1st number ; 2nd number.
such as: 2 ; 5;
and I want my program to get me the sum : 2 + 3 + 4 + 5 = 14
but I try many times and it always gives me : 2 + 5 = 7
This is my code :
using namespace std;
#include <iostream>
long result(long d , long e)
{
if (d >= 1 , d < e)
{
return (result(d + 1,0));
}
else
return (0);
}
int main()
{
long a,b;
long c;
cout << "1st number : ";
cin >> a;
cout << "2nd number : ";
cin >> b;
c = a + result(a , b) + b;
cout << c;
return 0;
}
Can someone tell what 's wrong with my code, and give me a hint to do it.
Thankz.
|
|
|
|
|
The result() function is incorrect. Try this:
long result(long d , long e)
{
long r = 0;
int i;
if (d <= e)
{
for (i == d, i <= e, i++)
{
r += i;
}
}
return (r);
}Also change this line:
c = a + result(a , b) + b;
to
c = result(a , b);
...Steve
1. quod erat demonstrandum
2. "Give a man a fish and you've fed him for a day. Teach him how to fish and you've fed him for life." I read that somewhere once 
|
|
|
|
|
Thankz for your reply. This is the first time so.....I will practice more.
By the way thankz for your "fish", hope next time to can show me how to fish.
Yeah!!!
|
|
|
|
|
Can anyone tell me how to output data and recieve from a com port on xp/nt in vs2005 managed C++ ?
I have done Parallel i/o before but only on win 9x and never serial.
Thx...
|
|
|
|
|
Hi,
if you are using .Net 2 then System::IO::Ports::SerialPort should be the way to go. However, i found this new serial port class quite unreliable (in terms of switching RTS) and used therefore recently the one from windows.h.
for example:
HANDLE _ComPort = CreateFile( ptrComName,....); // create a port
and use
WriteFile(_ComPort, ptrTxFrame, pTxFrameLength,&ulBytesWritten, 0);
ReadFile(_ComPort, ptrRxFrame, 256, &ulBytesWritten, NULL);
to read and write, but with this approach you'll always have to pinpoint your buffers.
pin_ptr<unsigned char> ptrTxFrame = &pTxFrame[0];
best regards Tobias
|
|
|
|
|
Thx Bee..
I think that was just what I needed.
I wonder tho, about the reliability.
I don't need rts or dts.. just to have them both stay high.
I am wondering if switching is a problem. Can you elaborate a bit on that part?
If I just set it high and forget it, will it stay?
I am hoping the problem you are talking about is the api not seeing the change state.
So if I set it then it will stay, not wanting to write a watchdog for it.
Thx for the reply..
|
|
|
|
|
Right, maybe it did sound a little negative. The reason for my statement was that my application really depends on a very accurate switching time between Request to Send enabled/disabled. For some reason this switching time differs for each switch, 5-15 ms while using the .Net class. Thus I need a constant switching time, which must be less than 10 ms, i'll sometimes run into trouble. With the windows.h method I have never discovered this problem. It displays all the time a continuous 5 ms switch time on my oscilloscope. Probably there is a way to close out this problem but by the time I faced this problem, it was quite critical to go ahead with my project. Therefore I decided to go for the unmanaged option for the time being.
However apart from this odd behaviour this new class is quite comfortable and very straight forward. I'll maybe give it another try after finishing my project.
best regards Tobias
|
|
|
|
|
Hi
I too have been looking for a way to access the comm ports using managed code. I'm pretty new to Visual C++ so I need a little more information regarding how to setup and access a com port connected to a USB-Serial adapter. My comm port shows up as COM7 in windows. I need baby steps for opening, configuring and sending and receiving data. I only need to send about 5 or 6 chars but can possibly receive 10 or up to 512 chars from the serial device I'm interfacing with. All the code I've come across on the web doesn't seem to work with Visual C++ 2005 expess Edition.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
