# PetscObjectQueryFunction

Gets a function associated with a given object.

### Synopsis

    #include "petsc.h"
    PetscErrorCode PETSC_DLLEXPORT PetscObjectQueryFunction(PetscObject obj,const char name[],void (**ptr)(void))

Collective on PetscObject

### Input Parameters

| obj | - the PETSc object; this must be cast with (PetscObject), for example, PetscObjectQueryFunction((PetscObject)ksp,...);
| name | - name associated with the child function

### Output Parameter

ptr -function pointer

### See Also

PetscObjectComposeFunctionDynamic()

Level:advanced
Location:src/sys/src/objects/inherit.c
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