Creating pixel graphics in MFC

I am working on a project that takes a file with a lot of x,y coordinates and a number, for how bright/dark a pixel should be, and shows all of these on the screen.

The result should be a sonar image of the sea floor, and the darker pixel's are in one area, the deeper it is there.

What I am having trouble with is choosing a method to display all of these points on my screen. How do I draw one pixel at a time (or 5 pixels at a time (in case 1 pixel is to small)), and set the pixels brightness?). The picture is in gray tones.

I am programming with C++ MfC, in the latest .Net edition of Visual C++

does anyone have a good suggestion?

Kristian (Norway)

Never used MFC or .NET and this is a real stab in the dark here but what about the WinAPI function:

SetPixel(hdc, x, y, RGB(0, 0, 0));

Replace 0, 0, 0 with values between 0 and 255 for levels of red, green and blue respectively. All zeros is black, all 255's is white.

Don't know about brightness.

okay, I'll try this and see what I get.

Thanks :-)

Kristian