Wysłanie kilku plików przez FTP

#include <windows.h>
#include <tlhelp32.h>
#include <tchar.h>
#include <stdio.h>
#include <wininet.h>
#include <ctime> 
#include <iostream> 
#pragma comment(lib, "wininet")

	int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
	{  

            char* appdata = getenv("APPDATA");             
            char* truepath = strcat(appdata, "\\plik.txt");

            HINTERNET hInternet;
            HINTERNET hFtpSession;
            hInternet = InternetOpen(NULL,INTERNET_OPEN_TYPE_DIRECT,NULL,NULL,0);
            hFtpSession = InternetConnect(hInternet, "host", INTERNET_DEFAULT_FTP_PORT, "login", "haslo", INTERNET_SERVICE_FTP, INTERNET_FLAG_PASSIVE, 0);

            FtpPutFile(hFtpSession, truepath, "plik", FTP_TRANSFER_TYPE_BINARY, 0);
            
            InternetCloseHandle(hFtpSession);  
            InternetCloseHandle(hInternet);   
            
            return 0; 
	}

char* truepath2 = strcat(appdata, "\\plik2.txt");

FtpPutFile(hFtpSession, truepath2, "plik2", FTP_TRANSFER_TYPE_BINARY, 0);

char* appdata = getenv("APPDATA");             
char* truepath = strcat(appdata, "\\plik.txt");

char buff[MAXPATH]={0},*truepath=strcat(strcat(buff,getenv("APPDATA")),"\\plik.txt");

char buff[MAXPATH]={0},*truepath=strcat(strcat(buff,getenv("APPDATA")),"\\plik.txt");

`MAXPATH' undeclared (first use this function) 
`buff' undeclared (first use this function) 

	const char* appdata = getenv("APPDATA");
	char truepath[MAX_PATH];

	...

	strcpy(truepath, appdata);
	strcat(truepath, "\\plik.txt");