The pointer information structure contains information such as the bit-map handle of the pointer and action point coordinates. The values returned for the parameters are in units relative to the size of the system icon or system pointer.
For example, if the application creates a pointer out of a bit map xWide units wide and positions the x-coordinate of the pointer's action point at xHot, then this function will return the value of the as:
xHotspot = (xHot * SystemPointerWidth) / xWide
where SystemPointerWidth can be obtained by using the WinQuerySysValue function.