These functions make it possible for you to manipulate files and communication ports at a low level. Low-level file functions should be used carefully, especially when manipulating table files. Before using these functions, test them on sample files before using them on files that contain important data.
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Change the size of a file opened with a low-level file function. |
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Flush and close a file or communication port opened with a low-level file function. |
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Create and open a low-level file. |
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Determine whether the file pointer is positioned at the end of a file. |
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Return a number corresponding to the most recent low-level file function error. |
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Flush to disk a file opened with a low-level function. |
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Return a series of bytes from a file or a communication port opened with a low-level file function until it encounters a carriage return.В |
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Open a file for use with low-level file functions. |
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Write a character string, carriage return, and line feed to a file opened with a low-level file function. |
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Return a specified number of bytes from a file opened with a low-level function. |
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Move the file pointer in a file opened with a low-level file function. |
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Write a character string to a file opened with a low-level file function. |
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Return the number of bytes in the header of the current or specified table file.В |
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