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    <p>If you are brave, and you don't want to depend on any third party tool, you should use Xlib. Documentation can be found <a href="http://www.x.org/wiki/ProgrammingDocumentation/" rel="nofollow noreferrer">here</a>. Also you can try <a href="http://python-xlib.sourceforge.net/" rel="nofollow noreferrer">python-xlib</a> if you don't want to mess with C/C++.</p> <p>Check this <a href="http://www.linuxquestions.org/questions/programming-9/simulating-a-mouse-click-594576/" rel="nofollow noreferrer">thread</a> for an example (C/C++).</p> <p>This is an example of a program that receives a coord and simulates a mouse click at that position.</p> <pre><code>#include &lt;X11/Xlib.h&gt; #include&lt;stdio.h&gt; #include&lt;unistd.h&gt; #include &lt;stdlib.h&gt; #include &lt;string.h&gt; #include &lt;unistd.h&gt; #include &lt;X11/Xlib.h&gt; #include &lt;X11/Xutil.h&gt; void mouseClick(int button) { Display *display = XOpenDisplay(NULL); XEvent event; if(display == NULL) { fprintf(stderr, "Errore nell'apertura del Display !!!\n"); exit(EXIT_FAILURE); } memset(&amp;event, 0x00, sizeof(event)); event.type = ButtonPress; event.xbutton.button = button; event.xbutton.same_screen = True; XQueryPointer(display, RootWindow(display, DefaultScreen(display)), &amp;event.xbutton.root, &amp;event.xbutton.window, &amp;event.xbutton.x_root, &amp;event.xbutton.y_root, &amp;event.xbutton.x, &amp;event.xbutton.y, &amp;event.xbutton.state); event.xbutton.subwindow = event.xbutton.window; while(event.xbutton.subwindow) { event.xbutton.window = event.xbutton.subwindow; XQueryPointer(display, event.xbutton.window, &amp;event.xbutton.root, &amp;event.xbutton.subwindow, &amp;event.xbutton.x_root, &amp;event.xbutton.y_root, &amp;event.xbutton.x, &amp;event.xbutton.y, &amp;event.xbutton.state); } if(XSendEvent(display, PointerWindow, True, 0xfff, &amp;event) == 0) fprintf(stderr, "Error\n"); XFlush(display); usleep(100000); event.type = ButtonRelease; event.xbutton.state = 0x100; if(XSendEvent(display, PointerWindow, True, 0xfff, &amp;event) == 0) fprintf(stderr, "Error\n"); XFlush(display); XCloseDisplay(display); } int main(int argc,char * argv[]) { int i=0; int x , y; x=atoi(argv[1]); y=atoi(argv[2]); Display *display = XOpenDisplay(0); Window root = DefaultRootWindow(display); XWarpPointer(display, None, root, 0, 0, 0, 0, x, y); mouseClick(Button1); XFlush(display); XCloseDisplay(display); return 0; } </code></pre>
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