title: Low-Level control of RS232 (Com-Port) RTS/CTS/DTR/DSR possible?
body: <p>I wonder if and how it's possible to control the RS-232 handshaking lines directly from win32 (the old C-API). </p>
  
  <p>I'd like to interface with an external piece of hardware, and two simple data-lines would be sufficient for my needs. </p>
  
  <p>So - is there a API for win32 that lets me read and write the state of the four status lines? In normal serial communication the handshaking lines are driven by the UART automatically (if hardware handshaking is enabled). </p>
  
  <p>I remember that it was trivial under DOS. One just had to program the UART directly. Has this functionality survived in win32 somehow? </p>