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#!N
#!N #!Rdxse DXSetError, DXErrorReturn, DXErrorGoto #!N #!N
Function #!N #!N Set an error code and an explanatory message.
#!N #!N Syntax #!N #!F-adobe-times-bold-r-normal--18* #include <dx/dx.h> Error DXSetError(ErrorCode e, char
*message, ...) #define DXErrorReturn(e,s) {DXSetError(e,s); return ERROR;} #define DXErrorGoto(e,s) {DXSetError(e,s); goto
error;} #!EF #!N #!N Functional Details #!N #!N Modules that return
#!F-adobe-times-bold-r-normal--18* ERROR #!EF should in many cases also set the error
code and error message. #!F-adobe-times-bold-r-normal--18* DXSetError #!EF provides the interface to
do this, and needs to be called only once for each
error. #!N #!N If a Data Explorer function returns an error
and sets an error code, the caller should usually return #!F-adobe-times-bold-r-normal--18*
ERROR #!EF without using one of these routines, since the error
message set by the Data Explorer function will usually be more
informative. If the error code is set by the Data Explorer
function and the calling program proceeds without returning #!F-adobe-times-bold-r-normal--18* ERROR #!EF
, #!F-adobe-times-bold-r-normal--18* DXResetError #!EF should be called. #!N #!N If the
Data Explorer function does not set the error code, it is
the calling function's responsibility to do so using one of these
routines. #!N #!N The #!F-adobe-times-bold-r-normal--18* message #!EF may be a #!F-adobe-times-bold-r-normal--18*
printf #!EF format string, in which case additional arguments as required
by the format string must be specified. Messages beginning with the
pound sign, #!F-adobe-times-bold-r-normal--18* # #!EF , are reserved for system use.
#!N #!N Additional information can be added to an error message
using the #!F-adobe-times-bold-r-normal--18* DXAddMessage #!EF function. #!N #!N #!F-adobe-times-bold-r-normal--18* DXErrorReturn #!EF
calls #!F-adobe-times-bold-r-normal--18* DXSetError #!EF and returns from the caller with return
value #!F-adobe-times-bold-r-normal--18* ERROR #!EF . #!N #!N #!F-adobe-times-bold-r-normal--18* DXErrorGoto #!EF calls
#!F-adobe-times-bold-r-normal--18* DXSetError #!EF and goes to the label "error." This is
useful when some clean-up activity is required (e.g., freeing allocated memory).
It is the caller's responsibility to provide the "error" label in
the code. #!N #!N The error code #!F-adobe-times-bold-r-normal--18* e #!EF must
be one of the following: #!CForestGreen #!N #!N #!F-adobe-courier-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* #!N
ERROR_ASSERTION ERROR_INTERNAL ERROR_NO_CAMERA #!N ERROR_BAD_CLASS ERROR_INVALID_DATA ERROR_NO_MEMORY #!N ERROR_BAD_PARAMETER ERROR_MISSING_DATA ERROR_NOT_IMPLEMENTED
#!N ERROR_BAD_TYPE ERROR_UNEXPECTED #!EF #!EF #!N #!N #!EC #!N #!N Return
Value #!N #!N Always return #!F-adobe-times-bold-r-normal--18* ERROR #!EF . #!N #!N
See Also #!N #!N #!F-adobe-times-bold-r-normal--18* #!Ldxam,dxall1168 h DXAddMessage, DXMessageReturn, DXMessageGoto #!EL , #!Ldxmess,dxall1307 h DXMessage #!EL , #!Ldxre,dxall1359 h DXResetError #!EL ,
#!Ldxw,dxall1407 h DXWarning #!EL #!EF #!N #!N #!Lerrsec,dxall1094 h Error Handling and Messages #!EL . #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next
Topic #!EF #!N #!N #!Ldxsetex,dxall1378 h DXSetErrorExit #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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