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"gc" is the Graphics Context.
All these functions are called like that : gc:function(...)

== Quick Overview== *gc:begin - *gc:clipRect(?, x, y, width, height) - *gc:drawArc(x, y, width, height, start angle, finish angle). *gc:drawImage(image,x,y) First argument in format “TI.Image”, x and y the coords. *gc:drawLine(xstart, ystart, xend, yend) Draws a line starting at the point (xstart,ystart) and ending at the point (xend, yend) *gc:drawPolyLine(int list1 [,int list2, .., int listN]) Draws a shape from a list contaning successively the x and y coordinates of each point the line have to draw. *gc:drawRect(x, y, xwidth, yheight) Draws a rectangle at (x,y) with the “x” side being “xwidth” long and the “y” side being “yheight” long *gc:drawString(string, x, y, position) position is the string’s anchor point and can be "baseline", “bottom”, “middle”, or “top”. *gc:fillArc(x, y, width, height, start angle, finish angle) see drawArc *gc:fillPolygon(int list1 [,int list2, .., int listN]) see drawPolyLine *gc:fillRect(x, y, width, height) see drawRect *gc:finish - *gc:getStringHeight(string) - Returns the string's height. *gc:getStringWidth(string) - Returns the string's width *gc:isColorDisplay Bool (Read-only) Returns 1 if the device has a color display, 0 if not. *gc:setAlpha(alpha) - where alpha is an integer between 0 and 255. Sets the transparency. *gc:setColorRGB(red, green, blue) RGB values are integers, from 0 to 255. *gc:setFont(font, type, size), with font : {“sansserif”, "serif", ..}, type {“b”, “r”, “i”}, size(int) *gc:setPen(thickness, smoothness) : thickness {“thin”, “medium”, "thick"}, smoothness {“smooth”, "dotted", "dashed"}