SetPixel is too slow. Is there a faster way to draw to bitmap?

Question

I have a small paint program that I am working on. I am using SetPixel on a bitmap to do that drawing of lines. When the brush size gets large, like 25 pixels across there i

Answer 1

SetPixel does this: is locks the whole image, sets the pixel and unlocks it

try to do that: you acquire a lock for the whole memory image with lockbits, process you update and release the lock after.

lockbits