# SetVCAN4Settings Method - neoVI API

This method writes configuration settings to a ValueCAN4-4 device.

{% tabs %}
{% tab title="C/C++ Declare" %}

```cpp
int _stdcall icsneoSetVCAN4Settings(void * hObject, SVCAN4Settings *pSettings, int iNumBytes, int bSaveToEEPROM);
```

{% endtab %}

{% tab title="Visual Basic .NET Declare" %}

```vbnet
Public Declare Function icsneoSetVCAN4Settings Lib “icsneo40.dll” (ByVal hObject As IntPtr, ByRef pSettings As SVCAN4Settings, ByVal iNumBytes As Int32, ByVal bSaveToEEPROM As Int32) As Int32
```

{% endtab %}

{% tab title="C# Declare" %}

```csharp
[DllImport(“icsneo40.dll”)] public static extern Int32 icsneoSetVCAN4Settings(IntPtr hObject, ref SVCAN4Settings pSettings, Int32 iNumBytes, Int32 bSaveToEEPROM);
```

{% endtab %}
{% endtabs %}

**Parameters**

hObject

\[in] Specifies the driver object created by [OpenNeoDevice](/neovi-api/win32-api-overview-intrepidcs-api/basic-functions-overview-intrepidcs-api/openneodevice-method-intrepidcs-api.md).

pSettings

\[in] The address of an allocated [SVCAN4Settings](/neovi-api/win32-api-overview-intrepidcs-api/structures-types-and-defines-overview-intrepidcs-api/setting-structures-overview-intrepidcs-api/svcan4settings-structure.md) structure.

iNumBytes

\[in] This value is always the size, in bytes, of the [SVCAN4Settings](/neovi-api/win32-api-overview-intrepidcs-api/structures-types-and-defines-overview-intrepidcs-api/setting-structures-overview-intrepidcs-api/svcan4settings-structure.md) structure.

bSaveToEEPROM

\[in] If set to 0, the settings changes will revert to the values stored in EEPROM when the ValueCAN3 is power-cycled. If set to 1, the values will overwrite the EEPROM settings and become persistent across power-cycles of the ValueCAN4-4.

**Return Values**

Returns 1 if successful, 0 if an error occurred. [GetLastAPIError](/neovi-api/win32-api-overview-intrepidcs-api/error-functions-overview-intrepidcs-api/getlastapierror-method-intrepidcs-api.md) must be called to obtain the specific error. The errors that can be generated by this function are:

NEOVI\_ERROR\_DLL\_NEOVI\_NO\_RESPONSE = 75

**Remarks**

Before using this function, the [SVCAN4Settings](/neovi-api/win32-api-overview-intrepidcs-api/structures-types-and-defines-overview-intrepidcs-api/setting-structures-overview-intrepidcs-api/svcan4settings-structure.md) structure must be initialized with the current neoVI settings using [GetVCAN4Settings](/neovi-api/win32-api-overview-intrepidcs-api/device-settings-functions-overview-intrepidcs-api/valuecan-4-4-intrepidcs-api/getvcan4settings-method-intrepidcs-api.md).

### Examples

{% tabs %}
{% tab title="C/C++ Example" %}

```cpp
SVCAN4Settings VCANReadSettings;
int iNumberOfBytes;
int iResult;

//################################
//VCANReadSettings struct is read
//and changed as needed before
//Setting the new values
//################################

iNumberOfBytes=sizeof(VCANReadSettings );
iResult = icsneoSetVCAN4Settings(m_hObject, &VCANReadSettings , iNumberOfBytes, 1);
if(iResult == 0)
{
    MessageBox::Show("Problem Sending VCAN configuration");
    return;
}
```

{% endtab %}

{% tab title="C# Example" %}

```csharp
SVCAN4Settings VCANReadSettings = new SVCAN4Settings();
int iNumberOfBytes;
int iResult;

//################################
//VCANReadSettings struct is read
//and changed as needed before
//Setting the new values
//################################

iNumberOfBytes = System.Runtime.InteropServices.Marshal.SizeOf(VCANReadSettings);
iResult = icsNeoDll.icsneoSetVCAN4Settings(m_hObject, ref VCANReadSettings , iNumberOfBytes, 1);

if(iResult == 0)
{
    MessageBox.Show("Problem Sending VCAN configuration");
    return;
}
```

{% endtab %}

{% tab title="Visual Basic .NET Example" %}

```vbnet
Dim VCANReadSettings As SVCAN4Settings
Dim iNumberOfBytes As Integer
Dim iResult As Integer

'//################################
'//VCANReadSettings struct is read
'//and changed as needed before
'//Setting the new values
'//################################

iNumberOfBytes = System.Runtime.InteropServices.Marshal.SizeOf(VCANReadSettings)
iResult = icsneoSetVCAN4Settings(m_hObject, VCANReadSettings , iNumberOfBytes, 1)

If iResult = 0 Then
    MsgBox("Problem Sending VCAN configuration")
    Exit Sub
End If
```

{% endtab %}
{% endtabs %}


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