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# DMShellSetRefine
Set the routine used to refine the `DMSHELL` 
## Synopsis
```
#include "petscdmshell.h"  
PetscErrorCode DMShellSetRefine(DM dm, PetscErrorCode (*refine)(DM, MPI_Comm, DM *))
```
Logically Collective

Input Parameters

- ***dm -*** the `DMSHELL`
- ***refine -*** the routine that refines the `DM`





## See Also
 `DM`, `DMSHELL`, `DMShellSetCoarsen()`, `DMRefine()`, `DMShellGetRefine()`, `DMShellSetContext()`, `DMShellGetContext()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/shell/dmshell.c.html#DMShellSetRefine">src/dm/impls/shell/dmshell.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex65.c.html">src/ksp/ksp/tutorials/ex65.c</A><BR>


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