SetSystemCursor

// USER32.dll
#include <windows.h>

BOOL SetSystemCursor(
    HCURSOR hcur,
    SYSTEM_CURSOR_ID id
);

<DllImport("USER32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetSystemCursor(
    hcur As IntPtr,   ' HCURSOR
    id As UInteger   ' SYSTEM_CURSOR_ID
) As Boolean
End Function

' hcur : HCURSOR
' id : SYSTEM_CURSOR_ID
Declare PtrSafe Function SetSystemCursor Lib "user32" ( _
    ByVal hcur As LongPtr, _
    ByVal id As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SetSystemCursor = ctypes.windll.user32.SetSystemCursor
SetSystemCursor.restype = wintypes.BOOL
SetSystemCursor.argtypes = [
    wintypes.HANDLE,  # hcur : HCURSOR
    wintypes.DWORD,  # id : SYSTEM_CURSOR_ID
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
SetSystemCursor = Fiddle::Function.new(
  lib['SetSystemCursor'],
  [
    Fiddle::TYPE_VOIDP,  # hcur : HCURSOR
    -Fiddle::TYPE_INT,  # id : SYSTEM_CURSOR_ID
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn SetSystemCursor(
        hcur: *mut core::ffi::c_void,  // HCURSOR
        id: u32  // SYSTEM_CURSOR_ID
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", SetLastError = true)]
public static extern bool SetSystemCursor(IntPtr hcur, uint id);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_SetSystemCursor' -Namespace Win32 -PassThru
# $api::SetSystemCursor(hcur, id)

#uselib "USER32.dll"
#func global SetSystemCursor "SetSystemCursor" sptr, sptr
; SetSystemCursor hcur, id   ; 戻り値は stat
; hcur : HCURSOR -> "sptr"
; id : SYSTEM_CURSOR_ID -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "USER32.dll"
#cfunc global SetSystemCursor "SetSystemCursor" sptr, int
; res = SetSystemCursor(hcur, id)
; hcur : HCURSOR -> "sptr"
; id : SYSTEM_CURSOR_ID -> "int"

; BOOL SetSystemCursor(HCURSOR hcur, SYSTEM_CURSOR_ID id)
#uselib "USER32.dll"
#cfunc global SetSystemCursor "SetSystemCursor" intptr, int
; res = SetSystemCursor(hcur, id)
; hcur : HCURSOR -> "intptr"
; id : SYSTEM_CURSOR_ID -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procSetSystemCursor = user32.NewProc("SetSystemCursor")
)

// hcur (HCURSOR), id (SYSTEM_CURSOR_ID)
r1, _, err := procSetSystemCursor.Call(
	uintptr(hcur),
	uintptr(id),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetSystemCursor(
  hcur: THandle;   // HCURSOR
  id: DWORD   // SYSTEM_CURSOR_ID
): BOOL; stdcall;
  external 'USER32.dll' name 'SetSystemCursor';

result := DllCall("USER32\SetSystemCursor"
    , "Ptr", hcur   ; HCURSOR
    , "UInt", id   ; SYSTEM_CURSOR_ID
    , "Int")   ; return: BOOL

●SetSystemCursor(hcur, id) = DLL("USER32.dll", "bool SetSystemCursor(void*, dword)")
# 呼び出し: SetSystemCursor(hcur, id)
# hcur : HCURSOR -> "void*"
# id : SYSTEM_CURSOR_ID -> "dword"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。