How to take screenshot of specific window in linux?

[rwikee]

Please correct my syntax

1. For taking screenshot of entire window, am using
status=MagickReadImage(magick_wand,"x:");

2. For taking snap of a particular window I used
status=MagickReadImage(magick_wand,"x:$WINDOWID");

Both are reporting syntax errors, but if I pass file names as second parameters then it is compiling without any failure. Please correct me. Thanks.........

[magick]

We're using ImageMagick 6.6.2-5 and this API call:

• status=MagickReadImage(magick_wand,"x:0x2800036");

It returns the screen shot of that particular window without complaint.

[rwikee]

Thanks, i used x:root. then croped the desired portion.