<#
	.SYNOPSIS
	Redirect user folders to a new location

	.EXAMPLE
	Set-KnownFolderPath -KnownFolder Desktop -Path "$env:SystemDrive:\Desktop"
#>
function Global:Set-KnownFolderPath
{
	[CmdletBinding()]
	param
	(
		[Parameter(Mandatory = $true)]
		[ValidateSet("Desktop", "Documents", "Downloads", "Music", "Pictures", "Videos")]
		[string]
		$KnownFolder,

		[Parameter(Mandatory = $true)]
		[string]
		$Path
	)

	$KnownFolders = @{
		"Desktop"   = @("B4BFCC3A-DB2C-424C-B029-7FE99A87C641")
		"Documents" = @("FDD39AD0-238F-46AF-ADB4-6C85480369C7", "f42ee2d3-909f-4907-8871-4c22fc0bf756")
		"Downloads" = @("374DE290-123F-4565-9164-39C4925E467B", "7d83ee9b-2244-4e70-b1f5-5404642af1e4")
		"Music"     = @("4BD8D571-6D19-48D3-BE97-422220080E43", "a0c69a99-21c8-4671-8703-7934162fcf1d")
		"Pictures"  = @("33E28130-4E1E-4676-835A-98395C3BC3BB", "0ddd015d-b06c-45d5-8c4c-f59713854639")
		"Videos"    = @("18989B1D-99B5-455B-841C-AB7C74E4DDFC", "35286a68-3c57-41a1-bbb1-0eae73d76c95")
	}

	$Signature = @{
		Namespace          = "WinAPI"
		Name               = "KnownFolders"
		Language           = "CSharp"
		CompilerParameters = $CompilerParameters
		MemberDefinition   = @"
[DllImport("shell32.dll")]
public extern static int SHSetKnownFolderPath(ref Guid folderId, uint flags, IntPtr token, [MarshalAs(UnmanagedType.LPWStr)] string path);
"@
	}
	if (-not ("WinAPI.KnownFolders" -as [type]))
	{
		Add-Type @Signature
	}

	foreach ($GUID in $KnownFolders[$KnownFolder])
	{
		[WinAPI.KnownFolders]::SHSetKnownFolderPath([ref]$GUID, 0, 0, $Path)
	}
	(Get-Item -Path $Path -Force).Attributes = "ReadOnly"
}