GTCROSSHAIR()    Display a CrossHair and Coordinates on the screen
GT_ALERT() Alert() replacement
GT_AMSG() Boxed multi line message
GT_ASKQUIT() Ask the user if they would like to quit
GT_ASKUSER() Ask the user a question
GT_BARBOX() Display a box containing a bar area
GT_BARCLEAR() Clear the bar area on the screen
GT_BARUPDATE() Update a bar on screen
GT_BIGTIME() Display the current time in BIG DIGITS
GT_BLATBOX() Draw a double lined box with a shadow around a text string
GT_BLOCK() Draws a '3d(ish)' box, and opptionally labels it
GT_COLORSET() Change/return the colour setting
GT_COLORTON() Converts Clipper colour string to numeric attribute
GT_COLORWIN() Colours an area of the screen.
GT_CSHADOW() 'C' Shadow routine that works with DISPBEGIN()/DISPEND()
GT_ELEVBAR() Output an elevator bar on screen
GT_ERROR() Display an error message on the screen and wait for response
GT_HELP() A general purpose Help function.
GT_HELPREQUEST Context Sensitive Help Driver
GT_HILITE() Change the flash brightnes etc of a colour string.
GT_INTERRUPT() GET/SET block for screen saver interrupts
GT_MENU() A general purpose menu function.
GT_MESSAGE() Display a message in a box on the screen
GT_NEWSCREEN() Completely redraw the screen with a header.
GT_NTOCOLOR() Converts numeric attribute to Clipper colour string
GT_PROGRESS() Display a progress bar and allow Esc option.
GT_RESTSCR() Restore a screen.
GT_SAVESCR() Save a screen.
GT_THEWALL() Draws a wall on screen. For Floyd fans only! <g>
GT_VIDEOMODE() Set the video mode
GT_WARNING() Output a warning message in white on red
GT_WINDOW() Display a boxed window on the screen.
GT_WORKING() Output "Working" in white on red on the bottom line