Draw a line in image using specified coordinates. This function can also draw the visible portion of a line with partially out of bound coordinates.
ImageNum : The number of the image. You can use a number from 0 to 63 (included).
sx, sy : Coordinates of the starting point of the line to draw.
ex, ey :Coordinates of the ending point of the line to draw
Color : The line's color.
A boolean value. True if the operation succeeded. False is returned if the image doesn't existes or if the image numberis out of bound.
To do.
// Listing #1: Todo.
To do