# DMSNESGetObjective
get `SNES` objective evaluation function 
## Synopsis
```
#include "petscsnes.h" 
#include "petscdm.h" 
PetscErrorCode DMSNESGetObjective(DM dm, PetscErrorCode (**obj)(SNES, Vec, PetscReal *, void *), void **ctx)
```
Not Collective


## Input Parameter

- ***dm -*** `DM` to be used with `SNES`



## Output Parameters

- ***obj-*** residual evaluation function; see `SNESObjectiveFunction` for details
- ***ctx -*** context for residual evaluation





## Note
`SNESGetFunction()` is normally used, but it calls this function internally because the user context is actually
associated with the `DM`.


## See Also
 `DMSNESSetContext()`, `DMSNESSetObjective()`, `SNESSetFunction()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/utils/dmsnes.c.html#DMSNESGetObjective">src/snes/utils/dmsnes.c</A>


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[Index of all SNES routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
