Erase the previous line of text
Objective: To move the text around the window.
We must erase the text before moving it.
Otherwise, we will see yellow text smeared across the screen.
Listing 3 erases the current line of text in preparation for re-drawing it in the same or in a different location.
Listing 3. Erase the previous line of text.
//Draw black text on the existing text to erase it. textout_ex( screen,//Specify bitmap on the screen font,//Use a default font "HELLO WORLD",//Specify the text to display x,//x-coordinate for text y,//y-coordinate for text makecol(0,0,0),//Color text black -1 );//Transparent text background.