Buffered input with GRX? - not conio.h

Any way of doing buffered, echoed-to-screen keyboard input within GRX, or with a GRX-compatible library (i.e. not using libc/conio.h, as it doesn't recognise unusual screen resolutions)? Functionality along the lines of GrStringXY(char *buffer, int x, int y, GrColor fg, GrColor bg) would be useful but not essential. J-P Stacey