XIconifyWindow, XWithdrawWindow, XReconfigureWMWindow - manipulate top-
   level windows


   Status XIconifyWindow(Display *display, Window w, int screen_number);

   Status XWithdrawWindow(Display *display, Window w, int screen_number);

   Status XReconfigureWMWindow(Display *display, Window w, int
          screen_number, unsigned int value_mask, XWindowChanges *values);


   display   Specifies the connection to the X server.

             Specifies the appropriate screen number on the host server.

             Specifies which values are to be set using information in the
             values structure.  This mask is the bitwise inclusive OR of
             the valid configure window values bits.

   values    Specifies the XWindowChanges structure.

   w         Specifies the window.


   The XIconifyWindow function sends a WM_CHANGE_STATE ClientMessage event
   with a format of 32 and a first data element of IconicState (as
   described in section 4.1.4 of the Inter-Client Communication
   Conventions Manual) and a window of w to the root window of the
   specified screen with an event mask set to SubstructureNotifyMask|
   SubstructureRedirectMask.  Window managers may elect to receive this
   message and if the window is in its normal state, may treat it as a
   request to change the window's state from normal to iconic.  If the
   WM_CHANGE_STATE property cannot be interned, XIconifyWindow does not
   send a message and returns a zero status.  It returns a nonzero status
   if the client message is sent successfully; otherwise, it returns a
   zero status.

   The XWithdrawWindow function unmaps the specified window and sends a
   synthetic UnmapNotify event to the root window of the specified screen.
   Window managers may elect to receive this message and may treat it as a
   request to change the window's state to withdrawn.  When a window is in
   the withdrawn state, neither its normal nor its iconic representations
   is visible.  It returns a nonzero status if the UnmapNotify event is
   successfully sent; otherwise, it returns a zero status.

   XWithdrawWindow can generate a BadWindow error.

   The XReconfigureWMWindow function issues a ConfigureWindow request on
   the specified top-level window.  If the stacking mode is changed and
   the request fails with a BadMatch error, the error is trapped by Xlib
   and a synthetic ConfigureRequestEvent containing the same configuration
   parameters is sent to the root of the specified window.  Window
   managers may elect to receive this event and treat it as a request to
   reconfigure the indicated window.  It returns a nonzero status if the
   request or event is successfully sent; otherwise, it returns a zero

   XReconfigureWMWindow can generate BadValue and BadWindow errors.


   BadValue  Some numeric value falls outside the range of values accepted
             by the request.  Unless a specific range is specified for an
             argument, the full range defined by the argument's type is
             accepted.  Any argument defined as a set of alternatives can
             generate this error.

   BadWindow A value for a Window argument does not name a defined Window.


   XChangeWindowAttributes(3), XConfigureWindow(3), XCreateWindow(3),
   XDestroyWindow(3), XRaiseWindow(3), XMapWindow(3), XUnmapWindow(3)
   Xlib - C Language X Interface


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.