Lucent Technologies USS-720 - Manual (Page 66)

7-8 Lucent Technologies Inc.
USS-720 Preliminary User Guide, Rev. 2
USB Device Driver February 1999
13
3 I/O File Functions (continued)
3.4.5 Error Codes
ERROR_DEVICE_REMOVE—The device instance has been removed.
ERROR_DEVICE_STOP—The device instance has been stopped.
STATUS_INVALID_PARAMETER—Control Code is either invalid for this device instance or the device instance is
in a state that cannot process the Control Code.
See specific Control Code for other errors (see Section 4 of this document).
3.5 CloseHandle
The CloseHandle I/O function closes an instance of a device and returns TRUE if the function is successful and
FALSE if it fails. Details regarding the syntax, parameters, return values, and error codes are listed below.
3.5.1 Syntax
BOOL
CloseHandle(
HANDLE hDev
);
3.5.2 Parameters
Input:
hDev—Handle returned from a successful CreateFile.
Output:
None.
3.5.3 Return Values
If the function succeeds, the return value is TRUE (1).
If the function fails, the return value is FALSE (0). To get extended error information, call GetLastError.
3.5.4 Notes
See the Win32 SDK documentation for complete definitions.
3.5.5 Error Codes
See WIN32 SDK documentation for possible errors.