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About Communications Resources
The file input and output (I/O) functions ( CreateFile, CloseHandle, ReadFile, ReadFileEx, WriteFile, and WriteFileEx) provide the basic interface for opening and closing a communications resource handle and for performing read and write operations. The communications functions provide access to communications resources. This overview describes the use of file I/O and communications functions.
- Communications Resource Handles
- Modification of Communications Resource Settings
- Communications Resource Configuration
- Modem Configuration
- Read and Write Operations
- Communications Events
- Extended Functions
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