:orphan:
# DMIsForest
Check whether a DM uses the DMFOREST interface for hierarchically-refined meshes 
## Synopsis
```
#include "petscdmforest.h" 
#include "petscdm.h" 
#include "petscdmlabel.h" 
PetscErrorCode DMIsForest(DM dm, PetscBool *isForest)
```
Not Collective


## Input parameter

- ***dm -*** the DM object



## Output parameter

- ***isForest -*** whether dm is a subtype of DMFOREST





## See Also
 `DMFOREST`, `DMForestRegisterType()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/forest/forest.c.html#DMIsForest">src/dm/impls/forest/forest.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex11.c.html">src/ts/tutorials/ex11.c</A><BR>


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


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