Screen Scrapping Win32 Dll

I need a C/C++ dll that has a function that will: 1) read into memory image of a custom list control from a third party application 2) identify currently selected line in that custom list control 3) if successful will recognize from the selected line and return them: a) an integer (1-9999) (value of one of the columns) b) value of a certain column (which can be one of 3 strings) c) if another column starts with a certain string or not if any of the above fails the function returns False, else returns True and the read values function should fail if part of the selected line in the list control is covered by another window or the application is minimized (but I think there are standard win32 functions to detect those) I need this done by reading custom control image and not by dll injection. The custom list control has the same font and color and columns everywhere but column widths can be set by the user to variable width so it might be tricky to identify where each column starts, probably can be done by reading control's header. Also the 3rd party has two skins and the dll should work for both, but both use the same custom list control and what differs is the position within the application where this list control is drawn Extra requirements: Must work under XP, Vista, Win7 Must use only win32 standard functions, if using any 3rd party library it must be free to redistribute Preferably should work with Visual Studio 2010 but as long as I can compile it on my computer I can be convinced to use any other compiler.