# DMLocalToLocalBeginDefaultShell
Uses the LocalToLocal VecScatter context set by the user to begin a local to local scatter Collective 
## Synopsis
```
#include "petscdmshell.h"  
PetscErrorCode DMLocalToLocalBeginDefaultShell(DM dm, Vec g, InsertMode mode, Vec l)
```

## Input Parameters

- ***dm -*** shell DM
- ***g -*** the original local vector
- ***mode -*** InsertMode



## Output Parameter

- ***l  -*** the local vector with correct ghost values




Note:  This is not normally called directly by user code, generally user code calls DMLocalToLocalBegin() and DMLocalToLocalEnd(). If the user provides their own custom routines to DMShellSetLocalToLocal() then those routines might have reason to call this function.


## See Also
 `DMLocalToLocalEndDefaultShell()`

## Level
advanced

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


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


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