Demo-Splatting.ps1

###
### Without splatting
###
Get-Process -Name dns -ComputerName localhost

###
### With splatting
###
$myparamas = @{
    Name = 'dns'
    ComputerName = 'localhost'
}
Get-Process @myparamas

###
### Using Splatting with $PSBoundParameters
###
function Get-Foo
{
    Param
    (
        # NOTE: Name maps to the parameter -Name of Get-Process
        $Name,

        # NOTE: ComputerName maps to the parameter -ComputerName of Get-Process
        $ComputerName,

        # NOTE: Param1 does NOT map to any parameters of Get-Process
        $Param1
    )

    ### Clean up the parameter that does NOT map
    if ($PSBoundParameters.ContainsKey('Param1'))
    {
        $PSBoundParameters.Remove('Param1')
    }
    ### Splat away!
    Get-Process @PSBoundParameters
}

### Demo
Get-Foo -Name dns -ComputerName localhost -Param1 baz