ADIC Digital Camera 601355 Rev A 사용자 설명서

2-880

API Functions

601355 Rev A

VSCMD_DriveQuery

 returns:

•

VSE_TRUE

-

Successful execution if the API is operating in 
synchronous mode

-

Good initial status received if the API is operating in 
asynchronous mode

•

VSE_FALSE - The request failed. A return code of 
VSE_FALSE (which is 0) means the request failed. 

-

To determine where the error occurred, and what the 
error was, the client queries the request’s error handle 
(with 

VS_Error_GetFields

) to retrieve the error 

handle’s object code. 

-

If the object code value is 

VSE_NONE

, the client must 

query the global error code (

VSG_Error

) to 

determine where the error occurred.

•

VSE_ERR_BADHANDLE - Specified handle was not a 
valid command handle.

•

VSE_ERR_NULLHANDLE - Specified handle was a null 
pointer.

-

If the object code value is 

VSE_VOLSERV

, the error 

occurred in VolServ and the client uses 

VST_ERROR_NUMCODE

 to identify the specific error. 

VSID_USER_FIELD (VST_USER_FIELD)

Value to put in 

USER_FIELD

 for this request.

 

USER_FIELD

 is a 16-character field provided 

for user information. Information entered in 
this field is echoed back to the user in every 
status message returned for this request. 
Neither the API software nor VolServ uses 

USER_FIELD

.