C++ CopyFile UNC Failure

You must make sure that you share the directory and set the path/file access security on the remote directory to allow you read write and create access. This usually means that you have to add a user group or "Anyone" to the access privledge list and set the appropriate check boxes corresponding to the privledge level you want to assign.

What does 'GetLastError()' return?

Im very new to C++ so havnt learnt much yet and im not sure how to apply the function you have suggested. I am able to create new files in the destination folder if i open in explorer so shouldnt be a permissions problem


/*Refresh Control*/

#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <fstream>
#include <windows.h>
#include <cstdlib>
#include <istream>
#include <iterator>
#include <fstream>
using namespace std;



int main ()
{

// declare a variable
int i;
int j;

for(i= 0; i < 1; i=0)

    {
      int i;
      printf ("Checking if processor is available...");
      if (system(NULL)) puts ("Ok");
      else exit (1);
      printf ("Executing Refresh...\n");
      i = system ("c:/folder/Refresh.acsauto");                                              
      printf ("RC: %d.\n",i); //Display Return Code


    for(int i=0; i<300000000;i++); //Wait For 5 Seconds
            printf ("Wait Finished");
            
            
            //Copy File
            CopyFile("C:\\Plasma\\ACD_Primary.txt", "\\\\?\\UNC\\Server\\Folder\\Output.txt",1);
         

         

    }
return 0;
MessageBox(NULL, "An Error Has Occured", "An Error Has Occured", MB_OK);
      
      
}

ive made that change and set up a test script to try and get the copy to work but its still not copying across, there wasnt a file to overwrite so the old code should still have worked. Do i have this set correctly is there a way to check if there is an error it seems to run through with no problems, should there be a return code i can check?


#include <windows.h>

int main ()
{
            //Copy File
            CopyFile("C:\\Plasma\\ACD_Primary.txt", "\\\\?\\UNC\\Server\\Folder\\Output.txt",0);
}

To check for errors, you could do the following:

#include <windows.h>
#include <stdio.h>

int main ()
{
            //Copy File
       BOOL bRC = CopyFile("C:\\Plasma\\ACD_Primary.txt", "\\\\?\\UNC\\Server\\Folder\\Output.txt",0);

        if (!bRC) printf("Error: %d\n", GetLastError());
}

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I have now tried this, a blank cmd box briefly pops up for a few secinds and then disapears with no error msge and nor is the file copied accross

In that case, try the following, so the error should be readable:

#include <windows.h>
#include <stdio.h>

int main ()
{
            //Copy File
       BOOL bRC = CopyFile("C:\\Plasma\\ACD_Primary.txt", "\\\\?\\UNC\\Server\\Folder\\Output.txt",0);

        if (!bRC) printf("Error: %d\n", GetLastError());

        Sleep(20000);
}

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Hi there was no error message just a blank screen

If there was no error message, the file should have been copied successfully...

It is now working thank you all for your help.