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# DMShellSetLocalToLocal
Sets the routines used to perform a local to local scatter 
## Synopsis
```
#include "petscdmshell.h"  
PetscErrorCode DMShellSetLocalToLocal(DM dm, PetscErrorCode (*begin)(DM, Vec, InsertMode, Vec), PetscErrorCode (*end)(DM, Vec, InsertMode, Vec))
```
Logically Collective on dm

Input Parameters

- ***dm -*** the `DMSHELL`
- ***begin -*** the routine that begins the local to local scatter
- ***end -*** the routine that ends the local to local scatter





## Note
If these functions are not provided but `DMShellSetLocalToLocalVecScatter()` is called then
`DMLocalToLocalBeginDefaultShell()`/`DMLocalToLocalEndDefaultShell()` are used to to perform the transfers


## See Also
 `DM`, `DMSHELL`, `DMShellSetGlobalToLocal()`, `DMLocalToLocalBeginDefaultShell()`, `DMLocalToLocalEndDefaultShell()`

## Level
advanced

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


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/shell/dmshell.c)


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