I used the following code but got an error

Add-Type -TypeDefinition @"
using System;
using System.Runtime.InteropServices;

public class MouseHelper {
    [DllImport("user32.dll")]
    public static extern bool SetCursorPos(int X, int Y);

    [DllImport("user32.dll")]
    public static extern void mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);

    [DllImport("user32.dll")]
    public static extern bool GetCursorPos(out POINT lpPoint);

    [StructLayout(LayoutKind.Sequential)]
    public struct POINT {
        public int X;
        public int Y;
    }
}
"@

function Get-CursorPos {
    $point = [MouseHelper]::POINT{}
    [MouseHelper]::GetCursorPos([ref]$point) | Out-Null
    return $point
}

function Drag-And-Drop {
    param(
        [Parameter(Mandatory=$true)]
        [int]$startX,

        [Parameter(Mandatory=$true)]
        [int]$startY,

        [Parameter(Mandatory=$true)]
        [int]$endX,

        [Parameter(Mandatory=$true)]
        [int]$endY
    )

    $cursorPos = Get-CursorPos
    $currentX = $cursorPos.X
    $currentY = $cursorPos.Y

    [MouseHelper]::SetCursorPos($startX, $startY)
    [MouseHelper]::mouse_event(0x0002, 0, 0, 0, 0)
    [MouseHelper]::SetCursorPos($endX, $endY)
    [MouseHelper]::mouse_event(0x0004, 0, 0, 0, 0)
    [MouseHelper]::SetCursorPos($currentX, $currentY)
}

Drag-And-Drop -startX 100 -startY 100 -endX 200 -endY 200

The following is the error message

The method call failed because [MouseHelper] does not contain a method named "POINT". Location C:UsersKKKKpowercat-mastershubiao.ps1:24 Char: 5

$point = [MouseHelper]::POINT{}



CategoryInfo : InvalidOperation: (:) [], RuntimeException

FullyQualifiedErrorId : MethodNotFound

Cannot apply [ref] to a variable that does not exist. Location C:UsersKKKKpowercat-mastershubiao.ps1:25 Characters: 5

[MouseHelper]::GetCursorPos([ref]$point) | Out-Null

~~ ...

I hope to be able to run the simulated mouse click correctly, and I can use other code.

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Oh, I am speechless. I have almost finished adding