You can use Win32 for that, just that you need to carefully craft your recorder.
Here are some function that you may use:

($x,$y) = GetCursorPos() * 

Retrieves the cursor's position,in screen coordinates as (x,y) array.

 
GetCaretPos() 

Retrieves the caret's position, in client coordinates as (x,y) array. 
+(Like Windows function)

IsKeyPressed($key) 

Wrapper around the GetAsyncKeyState API function. Returns TRUE if the 
+user presses the specified key.

FindWindowLike($window,$titleregex,$classregex,$childid,$maxlevel) 

Finds the window handles of the windows matching the specified paramet
+ers and returns them as a list.

$text = WMGetText($hwnd) * 

Sends a WM_GETTEXT to a window and returns its contents

GetListViewContents($window)
[download]

The point is that you can "record" a session using Win32, it's just not that simple.