X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 15 - topview - locate

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INT 15 - TopView - "LOCATE" - FIND WINDOW AT A GIVEN SCREEN LOCATION
        AX = 1018h
        BH = column
        BL = row
        ES = segment of object handle for window below which to search
             0000h = start search with topmost window
Return: ES = segment of object handle for window which is visible at the
               indicated position, or covered by indicated window
           = 0000h no window
SeeAlso: AX=1023h,AX=1024h

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