将 hdc 内容复制到位图 [英] copy hdc contents to bitmap

问题描述

How could you copy the contents of an HDC to a bitmap?

解决方案

Off the top of my head I think you need to:

• Create a new DC compatible with the source DC. Call this the memory DC.
• Create a new bitmap of the correct size.
• Select the bitmap into the memory DC.
• BitBlt the source DC into the memory DC.
• The bitmap should now contain a copy of the source DC.

I'm at home so can't give you any code, so I hope this is enough to get you started. There is a good GDI section on Code Project.

http://www.codeproject.com/KB/graphics/

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