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Windows API functions
>Liu,
>Don't use FILE_FLAG_OVERLAPPED in CreateFile. If this flag is used then the last parameter in >WriteFile must be a valid OVERLAPPED structure (cannot be NULL)
>HTH
CreateFile control Serial Port,dwFlagsAndAttributes must set FILE_FLAG_OVERLAPPED,if use FILE_FLAG_OVERLAPPED in CreateFile,How to use WriteFile lpOverlapped.
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