:orphan:
# SNESRegister
Adds a method to the nonlinear solver package. 
## Synopsis
```
#include "petscsnes.h"  
PetscErrorCode SNESRegister(const char sname[], PetscErrorCode (*function)(SNES))
```
Not Collective


## Input Parameters

- ***sname -*** name of a new user-defined solver
- ***function -*** routine to create method context





## Note
`SNESRegister()` may be called multiple times to add several user-defined solvers.


## Sample usage
```none
   SNESRegister("my_solver", MySolverCreate);
```


Then, your solver can be chosen with the procedural interface via
```none
SNESSetType(snes, "my_solver")
```
or at runtime via the option
```none
-snes_type my_solver
```


## See Also
 [](ch_snes), `SNESRegisterAll()`, `SNESRegisterDestroy()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/interface/snes.c.html#SNESRegister">src/snes/interface/snes.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/snes/interface/snes.c)


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