RwOpen(char *devname, void *param);
Arguments
devname The device name as a null-terminated string. Names currently supported under Windows are:
•
"MSWindows"
• "NullDevice"
The "NullDevice" driver allows the library to be used when output to a display is not required (for instance, when reading from or writing to files).
param If you intend to use a Direct Draw bitmap in a full screen mode then the applications window handle should be passed in here. Otherwise this parameter can be NULL