How to upload image in c++

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

#pragma comment(lib,"wininet.lib")
  #define ERROR_OPEN_FILE       10
  #define ERROR_MEMORY          11
  #define ERROR_SIZE            12
  #define ERROR_INTERNET_OPEN   13
  #define ERROR_INTERNET_CONN   14
  #define ERROR_INTERNET_REQ    15
  #define ERROR_INTERNET_SEND   16

  using namespace std;

  int main()
  {
     // Local variables
	 static char *filename   = "file";   //Filename to be loaded
	 static char *filepath   = "d:\\a.jpg";   //Filename to be loaded
     static char *type       = "image/jpeg";
     static char boundary[]  = "--BOUNDARY---";            //Header boundary
     static char nameForm[]  = "formname";     //Input form name
     static char iaddr[]     = "localhost";        //IP address
     static char url[]       = "/http/file.php";         //URL
	 
	 char hdrs[512]={'-'};                  //Headers
     char * buffer;                   //Buffer containing file + headers
     char * content;                  //Buffer containing file
     FILE * pFile;                    //File pointer
     long lSize;                      //File size
     size_t result;                   


     // Open file
     pFile = fopen ( filepath , "rb" );
     if (pFile==NULL) 
	 {
		 printf("ERROR_OPEN_FILE");
		 getchar();
		 return ERROR_OPEN_FILE;
	 }
	 printf("OPEN_FILE\n");

     // obtain file size:
     fseek (pFile , 0 , SEEK_END);
     lSize = ftell (pFile);
     rewind (pFile);
	
     // allocate memory to contain the whole file:
     content = (char*) malloc (sizeof(char)*lSize);
     if (content == NULL) 
	 {
		 printf("ERROR_MEMORY");
		 getchar();
		 return ERROR_OPEN_FILE;
	 }
     printf("MEMORY_ALLOCATED\t \"%d\" \n",&lSize);
     // copy the file into the buffer:
     result = fread (content,1,lSize,pFile);
     if (result != lSize) 
	 {
		 printf("ERROR_SIZE");
		 getchar();
		 return ERROR_OPEN_FILE;
	 }
     printf("SIZE_OK\n");

     // terminate
     fclose (pFile);
     printf("FILE_CLOSE\n");
     //allocate memory to contain the whole file + HEADER
     buffer = (char*) malloc (sizeof(char)*lSize + 2048);

     //print header
     sprintf(hdrs,"Content-Type: multipart/form-data; boundary=%s",boundary);
     sprintf(buffer,"%s\r\nContent-Disposition: form-data; name=\"%s\"; filename=\"%s\"\r\n",boundary,nameForm,filename);
     sprintf(buffer,"%sContent-Type: %s\r\n",buffer,type);
	 sprintf(buffer,"%s%s",buffer,content);
     sprintf(buffer,"%s--%s--\r\n",buffer,boundary);



     //Open internet connection
     HINTERNET hSession = InternetOpen("WINDOWS",INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
     if(hSession==NULL) 
	 {
		 printf("ERROR_INTERNET_OPEN");
		 getchar();
		 return ERROR_OPEN_FILE;
	 }
     printf("INTERNET_OPENED\n");

     HINTERNET hConnect = InternetConnect(hSession, iaddr,INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 1);
     if(hConnect==NULL) 
	 {
		 printf("ERROR_INTERNET_CONN");
		 getchar();
		 return ERROR_INTERNET_CONN;
	 }
	 printf("INTERNET_CONNECTED\n");

     HINTERNET hRequest = HttpOpenRequest(hConnect, (const char*)"POST",_T(url),NULL, NULL, NULL,INTERNET_FLAG_RELOAD, 1);
     if(hRequest==NULL) 
	  {
		 printf("ERROR_INTERNET_REQ");
		 getchar();
		
	 }
	 printf("INTERNET_REQ_OPEN\n");

     BOOL sent= HttpSendRequest(hRequest, hdrs, strlen(hdrs), buffer, strlen(buffer));
    	
     if(!sent) 
	 {
		 printf("ERROR_INTERNET_SEND");
		 getchar();
		 return ERROR_INTERNET_CONN;
	 }
	 printf("INTERNET_SEND_OK\n");

     //close any valid internet-handles
     InternetCloseHandle(hSession);
     InternetCloseHandle(hConnect);
     InternetCloseHandle(hRequest);
    
	 
     
	 getchar();
	 return 0;
  }