I have a simple task: to draw a point on a picture. The data of the point is in the form of (x, y, intensity). Let's say this intensity value is 1-255. I think it's appropriate to show the point in a bitmap with only one color. My question is how to create a bitmap(say with 100x100 dimension), draw this point on the bitmap, and show the bitmap in excel or store it in a bitmap file?