Take care when using the pointer bit-map handles returned by the WinQueryPointerInfo function in the POINTERINFO structure. If the handle is a system-pointer handle, or is returned by the WinQueryPointerInfo function, it is possible that another application is also accessing the bit-map handle. If this is so, selecting the bit map into a presentation space may fail. Only the active thread may use the bit-map handle returned by either the WinQuerySysPointer function, when fCopy is FALSE, or by the WinQueryPointerInfo function.
Note: This rule is not enforced by the system; therefore, ensure that the program handles selection failures correctly.