Need to add web browser in code and make it not visible then send api command.

Visual Basic code example:

Add Web browser

<WebView x:Name="WebBrowser" HorizontalAlignment="Stretch" Height="100" Margin="286,868,0,0" VerticalAlignment="Stretch" Width="100" Visibility="Collapsed" d:IsHidden="True" />

Send API command via HTTP (vMix API command is in RED)

Uri is the HTTP command you want to send.

WebBrowser.Navigate(New Uri("http://127.0.0.1:8099/API/?Function=SetText&SelectedIndex=1&Value=Camera%20Preset&Input=1"))

Here is what is used (not using http as plain text on port 8099 will be faster)

As i say this is running in the compiled DLL from the xaml for a title input. This makes the code a nightmare to debug!
Would even be nice to know where Console.WriteLine outputs stuff....???

This as you can tell was a kind of quick copy paste from a stackexchange page! Need to do the read before the write to get the data that is 'waiting' after you connect to vMix!

Function vMixCall(command As String)
Dim client = New TcpClient()
Try
client.Connect("127.0.0.1", 8099)
Dim networkStream As NetworkStream = client.GetStream()

' Read the NetworkStream into a byte buffer.
'This reads the welcome header fro vMix
Dim bytes(client.ReceiveBufferSize) As Byte
networkStream.Read(bytes, 0, CInt(client.ReceiveBufferSize))


' Output the data received from the host to the console.
Dim returndata As String = Encoding.ASCII.GetString(bytes)
Console.WriteLine(("Host returned: " + returndata))


Dim sendBytes As [Byte]() = Encoding.ASCII.GetBytes(command + vbCrLf)
networkStream.Write(sendBytes, 0, sendBytes.Length)
Catch ex As Exception

Finally
client.Close()
End Try
'FUNCTION OverlayInput1 Input=2
'PowerRed.Text = "2"
End Function