Hi Dmitri
You can find many captures resources in my blog as:

http://yousfi.over-blog.com/2015/02/capture-screen-or-windows-or-zones-by-apis-or-gdiplusx.html
http://yousfi.over-blog.com/2015/11/new-capture-and-save-form-surface-or-desktop-with-apis.html
http://yousfi.over-blog.com/2015/02/free-hand-capturing-as-bitmaps.html
http://yousfi.over-blog.com/2016/05/a-cool-desktop-zones-captures.html


can us ethe windows tool as this lione command

run/n c:\windows\sysnative\snippingtool.exe  &&for windows 32 and 64 bits .

(manually ALT+Printscreen key does the job after selecting activewindow (click on))