what is the use of Dword

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C

i know what is DWORD..

why we want use that to thread function................

Posted 24-Jun-11 0:08am

@BangIndia

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2 solutions

Solution 3

Why do you think we use it in thread function?

Posted 24-Jun-11 0:17am

CPallini

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@BangIndia 24-Jun-11 6:22am

then tell how to declare the thread function in c..
up i know the thread function wants have DWORD return type...

CPallini 24-Jun-11 6:42am

Yes, CreateThread has DWORD as return type. That makes it similar to most Win32 API. I don't think we should struggle about its deep philosophical meaning, though.

@BangIndia 24-Jun-11 6:45am

oh.. do you have any basic coding how to create a process in c under c

CPallini 24-Jun-11 6:52am

Isn't Google available to your browser? There's a plethora of code samples using CreateProcess in the web.

@BangIndia 24-Jun-11 6:54am

i can't able to find a simple code..
most of the code not working in MSDEV.

CPallini 24-Jun-11 7:01am

Then:
1. Post the code snippet you are trying.
2. Post the exact error message ('not working' isn't useful')
3. Give details about the IDE you are using (What MSDEV?).

@BangIndia 24-Jun-11 7:06am

// processs.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include "stdafx.h"
#include <windows.h>
#include <strsafe.h>
#include <direct.h>
#include <string.h>

void RunTest(TCHAR *AppName, TCHAR *CmdLine)
{
wprintf(L"\nTest Running...\n");
wprintf(L" AppName: %s\n", AppName);
wprintf(L" CmdLine: %s\n", CmdLine);

PROCESS_INFORMATION processInformation;
STARTUPINFO startupInfo;
memset(&processInformation, 0, sizeof(processInformation));
memset(&startupInfo, 0, sizeof(startupInfo));
startupInfo.cb = sizeof(startupInfo);

BOOL result;
TCHAR tempCmdLine[MAX_PATH * 2]; //Needed since CreateProcessW may change the contents of CmdLine
if (CmdLine != NULL)
{
_tcscpy_s(tempCmdLine, MAX_PATH *2, CmdLine);
result = ::CreateProcess(AppName, tempCmdLine, NULL, NULL, FALSE, NORMAL_PRIORITY_CLASS, NULL, NULL, &startupInfo, &processInformation);
}
else
{
result = ::CreateProcess(AppName, CmdLine, NULL, NULL, FALSE, NORMAL_PRIORITY_CLASS, NULL, NULL, &startupInfo, &processInformation);
}

if (result == 0)
{
wprintf(L"ERROR: CreateProcess failed!");
}
else
{
WaitForSingleObject( processInformation.hProcess, INFINITE );
CloseHandle( processInformation.hProcess );
CloseHandle( processInformation.hThread );
}
}

int _tmain(int argc, _TCHAR* argv[])
{
//Assumes ParamTest.exe is in the current working directory
RunTest(L"C:\\CreateProcessBug\\Debug\\ParamTest.exe", NULL);
RunTest(L"C:\\CreateProcessBug\\Debug\\ParamTest.exe", L"Param1 Param2 Param3");
RunTest(NULL, L"\"C:\\CreateProcessBug\\Debug\\ParamTest.exe\" Param1 Param2 Param3");
return 0;
}

D:\Users\Dharmaraj\my works in c\threads\processs\processs.cpp(6) : fatal error C1083: Cannot open include file: 'strsafe.h': No such file or directory
Error executing cl.exe.

CPallini 24-Jun-11 7:52am

What version of visual studio are you using?
Anyway if you are brave-hearted then you may discard
#include <strsafe.h>
and
change from
_tcscpy_s(tempCmdLine, MAX_PATH *2, CmdLine);
to
_tcscpy(tempCmdLine, CmdLine);

@BangIndia 24-Jun-11 8:45am

Hello u said to post the coding..but still i didn't get any result form you..

CPallini 24-Jun-11 8:50am

Actually I asked you about the Visual Studio version you are using and you didn't answer me. Moreover, just above your rant, there is my suggestion to discard the strsafe stuff and use insted _tcscpy.

Albert Holguin 24-Jun-11 13:38pm

I suggest you be a little nicer to someone helping, after all, he doesn't have to help... Just my five cents.. :)

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OriginalGriff · Accepted Answer · 2011-06-24T00:11:00

Solution 1

If you know what a DWORD is, then why would you be surprised if it is used in any particular function?

It is a suitable size of parameter to transfer information, that's all.

Posted 24-Jun-11 0:11am

OriginalGriff