Thanks Computergeeks01
The tutorial is (parts 1 and 2) on
http://www.lazyfoo.net/SDL_tutorials/lesson01/index2.php
actual code (which, as I said compiles and links OK) is:
#include "SDL.h"
int main( int argc, char* args[] )
{ //The images
SDL_Surface* hello = NULL;
SDL_Surface* screen = NULL;
//Start SDL
SDL_Init( SDL_INIT_EVERYTHING );
//Set up screen
screen = SDL_SetVideoMode( 640, 480, 32, SDL_SWSURFACE );
//Load image
hello = SDL_LoadBMP( "hello.bmp" );
//Apply image to screen
SDL_BlitSurface( hello, NULL, screen, NULL );
//Update Screen
SDL_Flip( screen);
//Pause
SDL_Delay( 2000 );
//Free the loaded image
SDL_FreeSurface( hello );
//Quit SDL
SDL_Quit();
return 0;
}