>> I want to copy only part of the screen (include few form objects).
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>GDI API call BitBlt allows to copy only a part of a source window. GDI and GDI+ libraries have their ways of copying images of windows to printer/file/another window and applying scaling and/or cropping.

Once the bmp is created what is the simplest way to send it directly to the printer? I tried with ShellExecute and Print parameter, but it brings Fax Viewer in open mode on my PC.