mouse clicks

I noticed this was posted in a previous thread:

Code:

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SetCursorPos(10, 10); /* Move the cursor to 10, 10 */
mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0); /* Left button down. */
mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, 0); /* Left button up. */

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Can someone tell me does this generate the click at 10,10 relative to the whole screen, or 10,10 relative to the active window?

If it is not relative to the active window then how could i make it so that it is? Is there a function that gets the top left x and y co-ordinates of the window so that i can adjust the numbers dynamically?

OK ignore this thread, I have found the answer.