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print and preview for WYSWYG in SDI

I plotted a graph using pDC->MoveTo and pDC->LineTo in SDI. After that, I wish to review the graph and also print out the graph. What I found is the graph is too small and overlapped. How can i preview and print the graph just the one I see on the SDI? FYI, I'm using WinApp for this program. Please guide me step by step. Thanks.
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kitlee
Asked:
kitlee
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nutsnutsCommented:
I guess you are using MSVC++, so there is a simple way to get print preview. Just implement your drawing code in OnDraw() Function and use the parameter pDC, then select print preview from File menu, so what you see is what you will get.
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RONSLOWCommented:
Problem is you are drawing in MM_TEXT coordinate (pixels).

Use a different mapping mode.

When drawing on the screen (to avoid lots of changes to your code), just use MM_TEXT as before.  When printing (you can ask the DC if it is for a printer or not), you select a mapping mode that results in a bigger image.
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