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Note on Error Checking
The HRESULT, referred to in the Syntax of each method, ALWAYS returns "S_OK", so it is not useful
in error checking.
Instead, use the error checking values described in the HTTP Post and Visual Basic above, and the Error
Information Methods below
[[]] to perform meaningful error checks.
Errors are based on the type of a function’s
out/retval
value. On error, a string
retval
is returned
as a null string, an integer
retval
returns -1, and Booleans will return FALSE.
Error Information Methods
GetLastErrorCode ( )
Returns the fault code from the last failed method call.
Syntax
HRESULT GetLastErrorCode(
[out, retval] long* Code
);
Parameters
Code [out, retval] Integer representing fault code.
Remarks
The value of
Code
corresponds to
faultCode
of an HTTP Post response when
status
is 0 (failure).
See {Fault Codes, page 48} for a list of defined codes.
GetLastErrorString ( )
Returns the description of the error from the last failed method call.
Syntax
HRESULT GetLastErrorString(
[out, retval] BSTR* ErrorString
);