DosRead - Parameters

hFile (HFILE) - input

File handle obtained from DosOpen.

pBuffer (PVOID) - output

Address of the buffer to receive the bytes read.

cbRead (ULONG) - input

The length, in bytes, of pBuffer.

This is the number of bytes to be read. A value of zero is treated as a null operation as is not considered an error.

In the raw file system, this must be a multiple of the sector size (512).

pcbActual (PULONG) - output

Address of the variable to receive the number of bytes actually read.

ulrc (APIRET) - returns

Return Code.

DosRead returns one of the following values:

• NO_ERROR 1
  ERROR_INVALID_FUNCTION
  5
  ERROR_ACCESS_DENIED
  6
  ERROR_INVALID_HANDLE
  26
  ERROR_NOT_DOS_DISK
  33
  ERROR_LOCK_VIOLATION
  87
  ERROR_INVALID_PARAMETER
  232
  ERROR_NO_DATA
  234
  ERROR_MORE_DATA
  For a full list of error codes, see Errors.

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