# fsVarsBVarGet<no value>
The **fsVarsBVarGet** function can be used to get the value of a specific `BVar`.

 

##### Syntax

``` wasm
FsVarError fsVarsBVarGet(
    FsBVarId bVarId,
    FsUnitId unitId,
    double* result,
    FsObjectId target
);
```

 

##### Parameters

<table><thead><tr class="header"><th>Parameters</th><th>Description</th></tr></thead><tbody><tr class="odd"><td><code>bVarId</code></td><td><p>The ID of a <code>BVar</code> (found using <code>fsVarsGetBVarId</code>).</p></td></tr><tr class="even"><td><code>unitId</code></td><td>The ID of a unit (found using <code>fsVarsGetUnitId</code>).</td></tr><tr class="odd"><td><code>result</code></td><td>The variable that will receive the value of the <code>BVar</code> if others parameters are correct.</td></tr><tr class="even"><td><code>target</code></td><td><p>The ID of the object from which the variable is being retrieved.</p></td></tr></tbody></table>

 

##### Return Values

The function returns a `FsVarError`, where 0 means there is no error (in which case, the value of the `BVar` has been set in `result`).

 

##### Example

``` wasm
FsUnitId unitId = fsVarsGetUnitId("BOOLEAN");
FsAVarId bVarId = fsVarsGetBVarId("AUXILIARY_SUNSHADE_ADJUST_PILOT", false);
double result = 0;
if (fsVarsBVarGet(bVarId, unitId, &result, FS_OBJECT_ID_USER_AIRCRAFT) == FS_VAR_ERROR_NONE)
{
    // valid
}
else
{
    // error
}
```