I am trying to check internet connection of the user by using internetcheckconnection().
The code:
#include <Wininet.h>
#include <iostream>
#include <string.h>
#include <windows.h>
#pragma comment(lib, "wininet.lib")
int main()
{
char url[128];
strcat(url, "http://www.techtoolbox.com");
bool bConnect = InternetCheckConnection(url, FLAG_ICC_FORCE_CONNECTION, 0);
if (bConnect) {
//internet connection exists !
std::cout << "yes";
}
else {
std::cout << "no ";
}
return 0;
}
But many error are coming up like
29 11 C:\Program Files (x86)\Dev-Cpp\MinGW64\x86_64-w64-mingw32\include\Wininet.h [Error] 'LPVOID' does not name a type
30 11 C:\Program Files (x86)\Dev-Cpp\MinGW64\x86_64-w64-mingw32\include\Wininet.h [Error] 'HINTERNET' does not name a type
32 11 C:\Program Files (x86)\Dev-Cpp\MinGW64\x86_64-w64-mingw32\include\Wininet.h [Error] 'WORD' does not name a type
and 431 more .
I have already installed Wininet.lib, but still these error are coming . It would be kind of you if you could solve this easy problem :) .
LPVOID, HINTERNET and other types from your error messages are declared in windows.h. You should rearrange includes to fix these errors:
#include <windows.h>
#include <Wininet.h>
Related
I am using EASendEmail with Visual C++. After I compile the code and run it, I get an error which reads: "Debug Error! /Program:[file path] /abort() has been called/ (press retry to debug the application)"
The code is from this website:https://www.emailarchitect.net/easendmail/kb/vc.aspx?cat=0
The error is occurring in the lins:
oSmtp->LicenseCode = _T("TryIt");
'
_tprintf(_T("Start to send email ...\r\n"));
I have tried debugging mode in visual studio and it lead me to an unhandled expression in an attached library and an error at a specific memory location.
c++
#include "pch.h"
#include "easendmailobj.tlh"
#include <tchar.h>
#include <iostream>
using namespace std;
using namespace EASendMailObjLib;
int _tmain(int argc, _TCHAR* argv[])
{
::CoInitialize(NULL);
IMailPtr oSmtp = NULL;
oSmtp.CreateInstance("EASendMailObj.Mail");//<- one cause of the error
oSmtp->LicenseCode = _T("TryIt");
//...
_tprintf(_T("Start to send email ...\r\n"));//<- one cause of the error
the error:https://imgur.com/a/M3C72Kc
I am making a game that can be played on mac and windows with cocos2d-x.
I first wrote the code in mac's Xcode, and it worked on mac.
When I took the project to windows and tried to build it in Visual Studio 2017, an error occurred.
Error C1083 Cannot open include file: 'cxxabi.h': No such file or directory Narazumono c:\users\masanori\desktop\narazumono3.17\classes_win\nrzcoding.cpp 10
I use cxxabi.h to get the class name of the object.
#include "NRZCoding.h"
#include <cxxabi.h>
#include <cstdio>
#include <algorithm>
#include "NRZUtils.h"
using namespace std;
USING_NS_CC;
namespace NRZCoding {
...
const string& EncodableObject::getClassName()
{
if (_className.size() > 0) {
return _className;
}
const type_info& id = typeid(*this);
int stat;
char *name = abi::__cxa_demangle(id.name(),0,0,&stat);
CCASSERT(name != NULL && stat == 0, "failed to demangle");
_className = string(name);
free(name);
return _className;
}
...
What do I need to do?
I am using cocos2d-x 3.17.1 and Visual Studio 2017.
Thank you.
I'm building a GTK+ VS2010 project configuration on (VS2013) and I'm trying to add a browse folder functionality (I want to use Native Windows way). I'm using the following code:
#include <windows.h>
#include <ShlObj.h>
DWORD WINAPI BrowseFolder(void *ptr)
{
char path[MAX_PATH];
cchar * path_param = (cchar*)ptr;
BROWSEINFO bi = { 0 };
bi.lpszTitle = ("Select Folder");
bi.ulFlags = BIF_RETURNONLYFSDIRS | BIF_NEWDIALOGSTYLE;
bi.lpfn = BrowseCallbackProc;//callback function defined..
bi.lParam = (LPARAM)path_param;
LPITEMIDLIST pidl = SHBrowseForFolder(&bi);
if (pidl != 0)
{
//get the name of the folder and put it in path
SHGetPathFromIDList(pidl, path);
//free memory used
IMalloc * imalloc = 0;
if (SUCCEEDED(SHGetMalloc(&imalloc)))
{
imalloc->Free(pidl);
imalloc->Release();
}
strcpy(g_sDefaultDir, path);
return 0;
}
}
but when compiling I'm getting this error message
1>C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\Include\shobjidl.h(17624): error C2061: syntax error : identifier 'IXMLDOMDocument'
This is my configuration:
I'm running VS2010 solution on VS2013
Use Standard Windows Libraries
Not Using ATL
and Use Multi-Byte character set
Any ideas?
I found 2 ways to answer solve my problem.
I had msxml and ISoftDistExt previously defined to solve ambiguity problem, so I had to #undef them like the following:
#undef __msxml_h__
#undef __ISoftDistExt_INTERFACE_DEFINED__
#include <MsXml.h>
#include <ShlObj.h>
Also, you can use the #import statement like the follownig
#undef __msxml_h__
#undef __ISoftDistExt_INTERFACE_DEFINED__
#import <msxml6.dll>
using namespace MSXML2;
#include <ShlObj.h>
Hope this will help someone later.
I am trying to run the following code to read the max processor throttle:
#include <iostream>
#include <string>
#include <tchar.h>
#include <windows.h>
#include <Powerbase.h>
#include <PowrProf.h>
using namespace std;
int main()
{
SYSTEM_POWER_CAPABILITIES sysc;
while (GetPwrCapabilities(&sysc)) {
cout << " Your Max Throttle is: " << static_cast<double> (sysc.ProcessorMaxThrottle) << endl;
}
Sleep(10000);
return 0;
}
However , I am receiving the following error:
...error LNK2019: unresolved external symbol _GetPwrCapabilities#4 referenced in function _main
...fatal error LNK1120: 1 unresolved externals
I tried the solution related to make sure the linker set to console program but it does not work. Any suggestion ?
I am using MSVS 2013.
Thanks
To make it work, you need to add PowrProf.lib to your project setting:
Project Properties -> Linker -> Input -> Additional Dependencies
I have tried writing a simple program to get information from a website. I can't compile as I get the LNK2019 error for InternetReadFile, InternetOpenUrl, etc. and e.g.
1>GetInternetInfo.obj : error LNK2019: unresolved external symbol _imp_InternetReadFile#16 referenced in function _main
I assume that means I did not define these functions, that I did not include the correct library. I thought including #include would fix it, but it does not seem to help. I am running this on Visual Studio 2010 using C++. Below is my program. Any help is appreciated.
#include <string>
#include <iostream>
#include <fstream>
#include <windows.h>
#include <wininet.h>
#include <winsock.h>
#include <stdio.h>
#include <stdarg.h>
using namespace std;
int main()
{
HINTERNET hOpen, hURL;
LPCWSTR NameProgram = L"Webreader"; // LPCWSTR == Long Pointer to Const Wide String
LPCWSTR Website;
char file[101];
unsigned long read;
//Always need to establish the internet connection with this funcion.
if ( !(hOpen = InternetOpen(NameProgram, INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0 )))
{
cerr << "Error in opening internet" << endl;
return 0;
}
Website = L"http://www.google.com";
hURL = InternetOpenUrl( hOpen, Website, NULL, 0, 0, 0 ); //Need to open the URL
InternetReadFile(hURL, file, 100, &read);
while (read == 100)
{
InternetReadFile(hURL, file, 100, &read);
file[read] = '\0';
cout << file;
}
cout << endl;
InternetCloseHandle(hURL);
return 0;
}
Please include "Wininet.lib" in your project settings.
Project->Properties->Configuration Properties->Linker->Input->Additional Dependencies
You can also add this line to your code after include section instead of adding library to the properties:
#pragma comment(lib, "wininet.lib")
Did you link to wininet.lib?
http://msdn.microsoft.com/en-us/library/aa385103(VS.85).aspx