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Top Forums Shell Programming and Scripting Shell Script to Capture a Screenshot Post 302926436 by Corona688 on Monday 24th of November 2014 12:24:27 PM
Old 11-24-2014
That's your kernel -- the 5 megabyte file which gets loaded when you turn on your computer. Everything else is decided by whatever your distribution is, which we still don't know.

Your window manager is particularly important here.
 

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Tk_CoordsToWindow(3)					       Tk Library Procedures					      Tk_CoordsToWindow(3)

__________________________________________________________________________________________________________________________________________________

NAME
Tk_CoordsToWindow - Find window containing a point SYNOPSIS
#include <tk.h> Tk_Window Tk_CoordsToWindow(rootX, rootY, tkwin) ARGUMENTS
int rootX (in) X-coordinate (in root window coordinates). int rootY (in) Y-coordinate (in root window coordinates). Tk_Window tkwin (in) Token for window that identifies application. _________________________________________________________________ DESCRIPTION
Tk_CoordsToWindow locates the window that contains a given point. The point is specified in root coordinates with rootX and rootY (if a virtual-root window manager is in use then rootX and rootY are in the coordinate system of the virtual root window). The return value from the procedure is a token for the window that contains the given point. If the point is not in any window, or if the containing window is not in the same application as tkwin, then NULL is returned. The containing window is decided using the same rules that determine which window contains the mouse cursor: if a parent and a child both contain the point then the child gets preference, and if two siblings both contain the point then the highest one in the stacking order (i.e. the one that's visible on the screen) gets preference. KEYWORDS
containing, coordinates, root window Tk Tk_CoordsToWindow(3)
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