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A handle to the cursor. The cursor must have been created by the CreateCursor function or loaded by the LoadCursor or LoadImage function. If this parameter is NULL, the cursor is removed from the screen.

Add-Type -AssemblyName System.Drawing
$tools = Add-Type –memberDefinition '  
    public struct IconInfo
    {
        public bool fIcon;
        public int xHotspot;
        public int yHotspot;
        public IntPtr hbmMask;
        public IntPtr hbmColor;
    }
    [DllImport("user32.dll")] public static extern bool SetSystemCursor(IntPtr hcur, uint id);  
    [DllImport("user32.dll")] public static extern bool GetIconInfo(IntPtr hIcon, ref IconInfo pIconInfo);  
    [DllImport("user32.dll")] public static extern IntPtr CreateIconIndirect(ref IconInfo icon);  
' -name "windowtools" -namespace Win32Functions –passThru -EA SilentlyContinue  

# transparentes Bitmap erstellen
$imgptr = (new-object System.Drawing.Bitmap 24,24).GetHicon()
# Iconinfo erstellen und Hotspot setzen
$iconinfo = new-object Win32Functions.windowtools+IconInfo
[Win32Functions.windowtools]::GetIconInfo($imgptr,[ref]$iconinfo)
$iconinfo.xHotspot = 12;$iconinfo.yHotspot = 12; $iconinfo.fIcon = $false
# Icon erstellen und Pointer zurückgeben
$icon = [Win32Functions.windowtools]::CreateIconIndirect([ref]$iconinfo)
# Folgende Cursor durch das transparente Icon ersetzen (OCR_NORMAL / OCR_WAIT / OCR_APPSTARTING)
@(32512,32514,32650) | %{[Win32Functions.windowtools]::SetSystemCursor($icon,$_) | out-null}