What i want to know is how can you give input to a GUI app that is closed source and does not have any public API.
To be more concise, let's say you open solitaire and want through a program to play it. Or, to go even to the basics, you have an GUI app with a button and you want to click it through another program.
I know the question is a little vague, but that's the best I can phrase it. Please help me with some edits or some comments to make it more specific.
Investigate SendInput(). It can be used to simulate mouse movements and key presses.
To locate a Windows application using its GUI you can use EnumWindows() to locate a Window with a particular title. This will provide a Window handle. To give that window focus, you could:
EnumWindows()GetWindowRect() to get the co-ordinates of the window rectangleSendInput() and simulate a mouse click using SendInput()I have done this once, and it is infuriatingly difficult to get right. Once you start your program sit on your hands: don't touch the mouse or the keyboard.
(I have no knowledge on how to do anything like this on Linux)
Assuming its an X11 app in Linux you could connect the process to one end of a named pipe and then echo X-Input events down the other end of the pipe.
