Question : how do i do i return the @exist from the function and do this code

Using connection As New SqlConnection(ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString)
Using command As New SqlCommand("Fn_User_Exist_Usuario", connection)
command.CommandType = Data.CommandType.StoredProcedure

Dim myParam1 As New SqlParameter("@USUARIO", VarChar, 150)
myParam1.Direction = Data.ParameterDirection.Input
myParam1.Value = UserName
command.Parameters.Add(myParam1)
connection.Open()
command.ExecuteNonQuery()
Dim Exist As Boolean = /// what i should do here??????? /////
If Exist = True Then
Return True
Else
Return False
End If
End Using
End Using

         
           
           
          SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER FUNCTION [dbo].[Fn_User_Exist_Usuario](@USUARIO VARCHAR(150))
RETURNS int
AS
Begin
	DECLARE @Exist int
    IF exists(SELECT TOP 1 USUARIO FROM TB_USER WHERE USUARIO = @USUARIO)
    begin
        Set @Exist = 1
    end else begin
        Set @exist = 0
    end;
RETURN @Exist
END

           
         

Answer : how do i do i return the @exist from the function and do this code

A function is not a stored procedure...

                       
         
           
           
             Using connection As New SqlConnection(ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString)
                Using command As New SqlCommand("select dbo.Fn_User_Exist_Usuario(@USUARIO)", connection)
                    'text command.CommandType = Data.CommandType.StoredProcedure

                    Dim myParam1 As New SqlParameter("@USUARIO", VarChar, 150)
                    myParam1.Direction = Data.ParameterDirection.Input
                    myParam1.Value = UserName
                    command.Parameters.Add(myParam1)
                    connection.Open()
                    Dim Exist As Boolean = Convert.ToBoolean(command.ExecuteScalar())
                    Return Exist
                End Using
            End Using

           
         