#define STRICT
#include <windows.h>
#include <tchar.h>
#include <assert.h>

const TCHAR szOperation[] = _T("open");
const TCHAR szAddress[] = _T("www.helloworld.com");

int WINAPI WinMain(HINSTANCE hInst, HINSTANCE h, LPSTR lpCmd, int nShow) {
 HINSTANCE hRslt = ShellExecute(NULL, szOperation, szAddress,
  NULL, NULL, SW_SHOWNORMAL);

 assert( hRslt > (HINSTANCE) HINSTANCE_ERROR);

 return 0;
}