Synax Highlighting w/ Dynamic Scriptblock - powershell

Question

I'm creating a dynamic ScriptBlock the way below so I can use local functions and variables and easily pass them to remote computers via Invoke-Command. The issue is that since all the text inside Create is enclosed with double quotes, I loose all my syntax highlighting since all editors see the code as one big string.
While this is only a cosmetic issue, I'd like to find a work around that allow my code to be passed without having double quotes. I've tried passing a variable inside Create instead of the actually text, but it does not get interpreted.
function local_admin($a, $b) {
([adsi]"WinNT://localhost/Administrators,group").Add("WinNT://$a/$b,user")
}
$SB = [ScriptBlock]::Create(#"
#Define Function
function local_admin {$Function:local_admin}
local_admin domain username
"#)
Invoke-Command -ComputerName server2 -ScriptBlock $SB

Answer 1

You can pass the function into the remote session using the following example. This allows you to define the ScriptBlock using curly braces instead of as a string.
# Define the function
function foo {
"bar";
}
$sb = {
# Import the function definition into the remote session
[void](New-Item -Path $args[0].PSPath -Value $args[0].Definition);
# Call the function
foo;
};
#(gi function:foo) | select *
Invoke-Command -ComputerName . -ScriptBlock $sb -ArgumentList (Get-Item -Path function:foo);
Here is a modified version of your function. Please take note that the domain and username can be dynamically passed into the remote ScriptBlock using the -ArgumentList parameter. I am using the $args automatic variable to pass objects into the ScriptBlock.
function local_admin($a, $b) {
([adsi]"WinNT://localhost/Administrators,group").Add("WinNT://$a/$b,user")
}
$SB = {
#Define Function
[void](New-Item -Path $args[0].PSPath -Value $args[0].Definition);
# Call the function
local_admin $args[1] $args[2];
}
Invoke-Command -ComputerName server2 -ScriptBlock $SB -ArgumentList (Get-Item -Path function:local_admin), 'domain', 'username';