Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
The import program can save any portion of the screen that the X11 API knows about. However, some applications bypass X11 and write directly to the screen. In that case, as you suggested, the import program will return gibberish.