Create an Application without a Window

Question

How would you program a C/C++ application that could run without opening a window or console?

Answer 1

In windows:

#include 

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPTSTR    lpCmdLine,
                     int       nCmdShow)
{
    // <-- Program logic here
    return 0;
}   

Be sure to use the /SUBSYSTEM linker switch as mentioned by Adam Mitz.

On other platforms:

int main(int argc, char**argv)
{
  // <-- Program logic here
  return 0;
}