Change system mouse cursor

[C# Programming]

End Google Ads 201810 - BS.net 01 --> I am trying to change the system mouse cursor to a large cross.
I can change it to a small cross and back but I cant seem to find h values for a large cross
here is my code for changing form norma to small cross and back;

private int IDC_CROSS = 32515 ;
private const uint OCR_NORMAL = 32512;

private void setcursor()
{
string cursorpath = System.Environment.GetEnvironmentVariable("windir");
IntPtr hcursor = LoadCursor(IntPtr.Zero, IDC_CROSS);
bool ret_val = SetSystemCursor(hcursor, OCR_NORMAL);

}