New Post: Is Something Wrong with OnDrawBackBuffer?

pmeems wrote:

I'm not sure why OnDrawBackBuffer is behaving like you mention.
But what do you try to do?
Looking at your code it looks like you want to create a railroad style, am I correct?
You can use the line pattern methods for that as well.

Here's an example: http://www.mapwindow.org/documentation/mapwingis4.8/_line_pattern_8cs-example.html#_a0

Thank you, pmeems,
I appreciate your helping :)

My code in my OnDrawBackBuffer is just an example,the Graphics Draw code can be something else..., OnDrawBackBuffer behaves like that each time I test my program like that...