C / C++ / MFC

23-Sep-09 16:16

Hi,all
I have a windows service program with a service,and I can use "myservice/service" in cmd.exe,it sucess!
then,I can see the service in control pane,I also can start up this service;
But, this service can't run my code; Confused | :confused:

why??

the whole code here

void yourfunction()

{

for (int a =0; a<10; a++)

::MessageBoxA(NULL, "ggg", "ghgh" ,MB_OK);

}

SERVICE_STATUS ServiceStatus =

{

SERVICE_WIN32_OWN_PROCESS | SERVICE_INTERACTIVE_PROCESS,
SERVICE_STOPPED,
SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PAUSE_CONTINUE | SERVICE_ACCEPT_PAUSE_CONTINUE,
0,0,0,0
};

TCHAR szSvName[]=TEXT("Myservice1");
SERVICE_STATUS_HANDLE hStatus;
SC_HANDLE SCMger;

void WINAPI ControlHandler(DWORD request);

void ServiceMain(int argc, char* argv);

void CreateMyService()
{
SCMger=OpenSCManager(NULL,NULL,SC_MANAGER_ALL_ACCESS);
CreateService(
SCMger,
szSvName,
szSvName,
SERVICE_START,
SERVICE_WIN32_OWN_PROCESS,
SERVICE_AUTO_START,
SERVICE_ERROR_IGNORE,
TEXT("c:\\myservice1.exe"),
NULL,
NULL,
NULL,
NULL,
NULL);
}

int main()
{
SERVICE_TABLE_ENTRY ServiceTable[2];
ServiceTable[0].lpServiceName = szSvName;
ServiceTable[0].lpServiceProc=(LPSERVICE_MAIN_FUNCTION)ServiceMain;
ServiceTable[1].lpServiceName = NULL;
ServiceTable[1].lpServiceProc= NULL;

if(StartServiceCtrlDispatcher(ServiceTable)==0)CreateMyService();
}

//this fun also can't be debug,can't run
void ServiceMain(int argc, char* argv)
{
hStatus = RegisterServiceCtrlHandler(szSvName,ControlHandler);
ServiceStatus.dwCurrentState = SERVICE_START_PENDING;
ServiceStatus.dwControlsAccepted = SERVICE_ACCEPT_SHUTDOWN;
SetServiceStatus(hStatus,&ServiceStatus);

ServiceStatus.dwWin32ExitCode = NO_ERROR;

ServiceStatus.dwCheckPoint = 0;
serviceStatus.dwWaitHint = 0;
ServiceStatus.dwCurrentState = SERVICE_RUNNING;
SetServiceStatus(hStatus,&ServiceStatus);

yourfunction();

ServiceStatus.dwCurrentState = SERVICE_STOPPED;

SetServiceStatus(hStatus,&ServiceStatus);
}

//this fun can't be debug,can't run

void WINAPI ControlHandler(DWORD request)
{
switch(request)
{

case SERVICE_CONTROL_SHUTDOWN:
ServiceStatus.dwCurrentState = SERVICE_STOPPED;
SetServiceStatus(hStatus,&ServiceStatus);
break;
}

}

jinjiashan23-Sep-09 21:50

23-Sep-09 21:50

who can help me?

jinjiashan24-Sep-09 0:04

24-Sep-09 0:04

?????

Rolf Kristensen26-Sep-09 7:49

Rolf Kristensen

26-Sep-09 7:49

When implementing a service, then it can be a good idea to make it react to a command-line parameter to control whether it should run as a service or as a standard console application. When needing to debug/test the service-functionality, then you just start it as a standard console application.

There are serveral NT-Service wrappers, that makes it easy to implement the standard NT-service interface:

http://www.naughter.com/serv.html[^]
http://msdn.microsoft.com/en-us/library/bb540476.aspx[^]
http://msdn.microsoft.com/en-us/library/ms810429.aspx[^]

jinjiashan27-Sep-09 13:29

Problem with initializing Main args!

27-Sep-09 13:29

thank you Snakefoot, I finish it;

Largo6523-Sep-09 12:58

Largo65

23-Sep-09 12:58

Hi, I am building an application using the OGRE 3D engine and Rebecca API for AIML. The problem is when creating a NetworkAimlFacade object. Its constructors need the "int argc, char* args[]" that are normally in the main method. But I'm not using any main method and I am building an independent class based on a sample console application:

Here is my class:

class ChatBot
{
	private:
	
		NetworkGraphBuilder* builder;
	
	public:
		ChatBot(){

			NetworkAimlFacade aiml(argc, args); // Where can I get these vars?
			NetworkGraphBuilder &builder = aiml.getNetworkGraphBuilder();
			string botName = builder.getBotPredicate("name").c_str();
			StringPimpl response = builder.getResponse("connect");		

	}
		string askQuestionAndGetAnswer( string input )
		{
			StringPimpl strPimText;
			builder->getResponse(strPimText);
			string responseString = strPimText.c_str();
			return (responseString);
		}
};

Here is part of the console sample:

int main (int argc, char* args[]) 
{
		/*
		 * This is responsible for memory management of 
		 * GraphBuilder.
		 */
		NetworkAimlFacade aiml(argc, args);

Can anyone tell me if it is possible to initialize the "argc" and "args" variables with out the main method? (I've tried a couple of ways but they don't work Frown | :(

Game-point23-Sep-09 18:40

Game-point

23-Sep-09 18:40

try another signatures in Constructor ..is it possible ??

Saurabh.Garg23-Sep-09 18:56

Saurabh.Garg

23-Sep-09 18:56

argc and argv together define an array of strings. Typically they are used to pass arguments from command line to an application but it is not necessary that arguments should come from command line.

In the context of NetworkAimlFacade, just think of a class with constructor taking two arguments. First is the size of an array and second argument is the pointer to array. Read the NetworkAimlFacade documentation to see what parameters does it except. If it is the case that it can work with default settings, when no arguments are passes then you use NetworkAimlFacade aiml(0, 0);

-Saurabh

«_Superman_»23-Sep-09 19:23

«_Superman_»

23-Sep-09 19:23

To get the entire command line for a process use the GetCommandLine[^] API.
To convert the command line to an array similar to argv, use the CommandLineToArgvW[^] API.

«_Superman_»
I love work. It gives me something to do between weekends.

C++ with in-code Assembly

Richard MacCutchan23-Sep-09 22:32

Richard MacCutchan

23-Sep-09 22:32

Largo65 wrote:
But I'm not using any main method

So how do you run the program?

Largo65 wrote:
ChatBot(){

NetworkAimlFacade aiml(argc, args); // Where can I get these vars?

The ChatBot() constructor takes no parameters, and yet within the constructor you have the statement NetworkAimlFacade aiml(argc, args);. You need to present these paramaeters to the constructor thus: ChatBot(int argc, char** args).

paolosh23-Sep-09 10:22

paolosh

23-Sep-09 10:22

Hi everyone,

Quick question about inline assembler with C++ code.

I was just wondering if, when using inline assembler in a class method, it is necessary to push all registers I am going to use onto the stack and then pop them off after I'm done. I thought this might be necessary because the C compiler might require their contents after the _asm{} code execution.

For example;

void MyClass::MyFunction(){
int a, b, c; // for example

// maybe have some C code here

_asm{
// *
// assembler code using a number of registers (eax, ebx, ecx, for example)
// **
}

// maybe have some more C code here
}

My question is: should I push (at //*) those registers I'm going to utilize, and then pop them (at //**) in the above code.

Help would be much appreciated.

Many thanks,
Paul

Re: C++ with in-code Assembly

ied23-Sep-09 10:28

ied

23-Sep-09 10:28

Generally for the AX/BX/CX/DX/SI/DI registers, no. All others (BP, segment registers, etc...) yes. Depends on the compiler really.
-- Ian

Re: C++ with in-code Assembly

Rick York23-Sep-09 10:37

Rick York

23-Sep-09 10:37

I disagree with the other answer. I think that, yes, you should push and pop any registers that you are going to touch. The compiler will take care of the rest automatically.

As an exercise, you should turn assembly code listings on for a small project and examine some of the code emitted by the compiler. In can be very educational for things like this.

-edit- if you have doubts then comment off the push and pops and see what happens. The phrase "unexpected results" comes to mind. However, if you change ECX without restoring it the results will be not unexpected - the app will most likely crash since the this pointer is different.

LoadImage fails to locate file

raich23-Sep-09 8:32

raich

23-Sep-09 8:32

Hi All,

I have a problem with LoadImage method in my small Visual C++ project in Visual Studio 2008. No matter what I pass as filename, The GetLastError always returns "The System Cannot find the File Specified".

I've tried with Loading from the resource:

m_pBitmap->LoadBitmap(IDB_BITMAP1); //THIS WORKS PERFECTLY

But I've commented out this line and instead using the following code in OnInitialUpdate() method. But It fails. I've placed the bmp file in C: also in the Debug directory from where I run the executable. (While running from Debug the filename is simply "barcode.bmp" and I've placed the bmp file in the Debug directory.)

But I always get the error: The System Cannot find the File Specified. Definitely, I'm missing something but I'm unable to find out....

----------------------------------------------------------------------------------
void CMymfcBitmapView::OnInitialUpdate()
{
.
.
.

//m_hBitmap is a HBITMAP Member Variable in the my View Class
m_hBitmap = (HBITMAP)LoadImage(NULL, (LPCWSTR)"c:\\barcode.bmp",IMAGE_BITMAP,0,0,LR_LOADFROMFILE);

if(m_hBitmap == NULL)
{
//DWORD err = ::GetLastError();

LPVOID lpMsgBuf;

::FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |FORMAT_MESSAGE_FROM_SYSTEM |FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf,
0,
NULL);

::MessageBox( NULL, (LPCTSTR)lpMsgBuf, (LPCWSTR)"Error", MB_OK | MB_ICONINFORMATION );

// Free the buffer.
LocalFree( lpMsgBuf );

}
--------------------------------------------------

Thanking you all in Advance....

David Crow23-Sep-09 9:03

David Crow

23-Sep-09 9:03

raich wrote:
m_hBitmap = (HBITMAP)LoadImage(NULL, (LPCWSTR)"c:\\barcode.bmp",IMAGE_BITMAP,0,0,LR_LOADFROMFILE);

Is the LPCWSTR cast necessary?

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

raich23-Sep-09 9:42

raich

23-Sep-09 9:42

Otherwise my compiler complains...
------------------------------------------
error C2664: 'LoadImageW' : cannot convert parameter 2 from 'char *' to 'LPCWSTR'

And It shows LoadImageW!!
------------------------------------------

Casting with (LPCWSTR) at least made my code compilation error free....

David Crow23-Sep-09 10:00

David Crow

23-Sep-09 10:00

raich wrote:
Casting with (LPCWSTR) at least made my code compilation error free....

But that does not always mean it's the right thing to do. Have you tried prefacing the string literal with an L?

norish23-Sep-09 21:43

norish

23-Sep-09 21:43

This error C2664 predicts your runtime error; this is the reason.
You should change the path encoding from ascii to unicode.

ied23-Sep-09 9:56

ied

23-Sep-09 9:56

I'd say you're passing an Ansi string to something expecting Unicode (ie: wide strings).

Try:
L"C:\\barcode.bmp" or
_T("C:\\barcode.bmp")

-- Ian

raich23-Sep-09 10:02

raich

23-Sep-09 10:02

Thank you Ian...It worked
And David thanks to you also....