draw a picture in the CANVAS control?

[luoxinp]

I want draw a picture in the CANVAS. Every time I draw one point from left to right in the first line. If finished one line, all line have finished will move down one line. Then I will draw new line from the first line.

ALL this like a picture one by one line display from the top of CANVAS.

Thanks' very much!

[yuxin_wang]

http://www.ni.com/example/26956/en/ 

you could see if this example will help