Here's a step by step process:
Open Dev-C++, go to File > New > Project, click Console Application and type in a name, save it somewhere, and paste the following into the editor:
#include
using namespace std;
int main ()
{
cout << "Hello World!";
system("PAUSE");
return 0;
}
Then hit the Compile and Run button on the top left, and the program should be launced.