I would like to be able to print to the normal and a printer DC without
having to modify my code.

Example:

If a draw a line:
    MoveToEx (TheDC, 10, 10, pt);
    LineTo (TheDC, 100, 10);

the result should be the same on a printer DC and a normal DC. This is what
i am doing. Please help me modify the following code to get the result i
need.

OldMap = SetMapMode(TheDC, MM_ISOTROPIC);
Result = SetWindowExtEx(TheDC, GetDeviceCaps(TheDC, LOGPIXELSX),
GetDeviceCaps(TheDC, LOGPIXELSX), sz);
Result = SetViewportExtEx(TheDC, GetDeviceCaps(TheDC, LOGPIXELSX),
GetDeviceCaps(TheDC, LOGPIXELSY), sz);

I am not sure but i think this is what i should be doing. Change the mapmode
to MM_ISOTROPIC and change the window and viewport ext to the
GetDeviceCaps(TheDC, LOGPIXELSX) and GetDeviceCaps(TheDC, LOGPIXELSY) .
Please let me know what i am doing wrong, the result comes out different on
the printer and monitor.

Thanks Italo S Weiss.

I think you're meant to use setWindowExt to set the arbitrary units
you want to work with. You've set it to the device resolution. Try
something like this:

Result = SetWindowExtEx(TheDC, 100, 100, NULL);
Result = SetViewportExtEx(TheDC, GetDeviceCaps(TheDC, LOGPIXELSX),
                        GetDeviceCaps(TheDC, LOGPIXELSY), sz);

Dave
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Thanks I am going to try.

Italo S Weiss