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# DMCompositeAddDM
adds a `DM` vector to a `DMCOMPOSITE`
## Synopsis
```
#include "petscdmcomposite.h"
PetscErrorCode DMCompositeAddDM(DM dmc, DM dm)
```
Collective
## Input Parameters
- ***dmc -*** the `DMCOMPOSITE` object
- ***dm -*** the `DM` object
## See Also
`DMCOMPOSITE`, `DM`, `DMDestroy()`, `DMCompositeGather()`, `DMCompositeAddDM()`, `DMCreateGlobalVector()`,
`DMCompositeScatter()`, `DMCompositeCreate()`, `DMCompositeGetISLocalToGlobalMappings()`, `DMCompositeGetAccess()`,
`DMCompositeGetLocalVectors()`, `DMCompositeRestoreLocalVectors()`, `DMCompositeGetEntries()`
## Level
advanced
## Location
src/dm/impls/composite/pack.c
## Examples
src/snes/tutorials/ex21.c
src/snes/tutorials/ex22.c
src/snes/tutorials/ex28.c
src/snes/tutorials/ex73f90t.F90
src/ts/tutorials/ex14.c
---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/composite/pack.c)
[Index of all DM routines](index.md)
[Table of Contents for all manual pages](/manualpages/index.md)
[Index of all manual pages](/manualpages/singleindex.md)