Indicates that subsequent open operations on the object will succeed only if read access is requested. The following table shows the possible values for dwShareMode. This parameter can be set to one or more values. Subsequent open operations on the object will fail, until the handle is closed. If dwShareMode is zero, the object cannot be shared. Combine with GENERIC_READ for read/write access. Data can be written to the file and the file pointer can be moved. Combine with GENERIC_WRITE for read/write access. Data can be read from the file and the file pointer can be moved. An application can query device attributes without accessing the device. Specifies device query access to the object.

The following table shows possible values for dwDesiredAccess. An application can obtain read-only access, write-only access, read/write access, or device query access. For example, specify COM1: to open that port. When lpFileName points to a COM port to open, you must include a colon after the name. This limit is related to how the CreateFile function parses paths. If * lpFileName is a path, there is a default string size limit of MAX_PATH characters. Pointer to a null-terminated string that specifies the name of the object, such as file, COM port, disk device, or console, to create or open. HANDLECreateFile(LPCTSTRlpFileName, DWORDdwDesiredAccess, DWORDdwShareMode, LPSECURITY_ATTRIBUTESlpSecurityAttributes, DWORDdwCreationDisposition, DWORDdwFlagsAndAttributes, HANDLEhTemplateFile) It returns a handle that you can use to access the object.Ī RAPI version of this function exists, and it is named CeCreateFile (RAPI). This function creates, opens, or truncates a file, COM port, device, service, or console.

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