[Send-EnvironmentChangeEvent] :: Broadcasts message to all Windows processes about changes in the Environment variables

Send-EnvironmentChangeEvent.ps1

function Send-EnvironmentChangeEvent {

	DATA ImportWin32Declaration  {'
		[DllImport("user32.dll", EntryPoint = "SendMessageTimeout")]
		public static extern IntPtr SendMessageTimeout(
			IntPtr hWnd, UInt Msg, UIntPtr wParam, String lParam, UInt fuFlags, UInt uTimeout, out UIntPtr lpdwResult
		);
	'} 

	if (-not ("Win32.NativeMethods" -as [Type])) {
		Add-Type -Namespace Win32 -Name NativeMethods -MemberDefinition $ImportWin32Declaration
	}
 
	[Win32.NativeMethods]::SendMessageTimeout(
		[IntPtr] 0xffff, 0x1a, [UIntPtr]::Zero, "Environment", 2, 5000, [ref] ($result = [UIntPtr]::Zero)
	)
}