i have a vague concept on how printing is perform through win32, any simple idea/resource for me?

assume, i got paper sized at 50mm(w) X 30mm(h), and i want to have a WYSIWUG region in my application, how should i proceed.

ok, since display is using pixel instead of mm, so maybe a proc to convert mm to px and px to mm.

but how to know how many pixel in 1 mm of printer paper? resolution?

or i miss anything else? please enlight me. thank you.

In Windows a printer device can be used in the same way as any graphics device. Open a DC to it and start drawing. You can get the device capabilities (resolution/colours etc.) with GetDeviceCaps.