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GetScrollBarInfo

関数

指定ウィンドウのスクロールバー情報を取得する。

DLLUSER32.dll呼出規約winapiSetLastErrorあり対応OSWindows Vista 以降

シグネチャ

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

BOOL GetScrollBarInfo(
    HWND hwnd,
    OBJECT_IDENTIFIER idObject,
    SCROLLBARINFO* psbi
);

パラメーター

名前	型	方向
hwnd	HWND	in
idObject	OBJECT_IDENTIFIER	in
psbi	SCROLLBARINFO*	inout

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL GetScrollBarInfo(
    HWND hwnd,
    OBJECT_IDENTIFIER idObject,
    SCROLLBARINFO* psbi
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool GetScrollBarInfo(
    IntPtr hwnd,   // HWND
    int idObject,   // OBJECT_IDENTIFIER
    IntPtr psbi   // SCROLLBARINFO* in/out
);

<DllImport("USER32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetScrollBarInfo(
    hwnd As IntPtr,   ' HWND
    idObject As Integer,   ' OBJECT_IDENTIFIER
    psbi As IntPtr   ' SCROLLBARINFO* in/out
) As Boolean
End Function

' hwnd : HWND
' idObject : OBJECT_IDENTIFIER
' psbi : SCROLLBARINFO* in/out
Declare PtrSafe Function GetScrollBarInfo Lib "user32" ( _
    ByVal hwnd As LongPtr, _
    ByVal idObject As Long, _
    ByVal psbi As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetScrollBarInfo = ctypes.windll.user32.GetScrollBarInfo
GetScrollBarInfo.restype = wintypes.BOOL
GetScrollBarInfo.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND
    ctypes.c_int,  # idObject : OBJECT_IDENTIFIER
    ctypes.c_void_p,  # psbi : SCROLLBARINFO* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
GetScrollBarInfo = Fiddle::Function.new(
  lib['GetScrollBarInfo'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND
    Fiddle::TYPE_INT,  # idObject : OBJECT_IDENTIFIER
    Fiddle::TYPE_VOIDP,  # psbi : SCROLLBARINFO* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn GetScrollBarInfo(
        hwnd: *mut core::ffi::c_void,  // HWND
        idObject: i32,  // OBJECT_IDENTIFIER
        psbi: *mut SCROLLBARINFO  // SCROLLBARINFO* in/out
    ) -> 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 GetScrollBarInfo(IntPtr hwnd, int idObject, IntPtr psbi);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_GetScrollBarInfo' -Namespace Win32 -PassThru
# $api::GetScrollBarInfo(hwnd, idObject, psbi)

#uselib "USER32.dll"
#func global GetScrollBarInfo "GetScrollBarInfo" sptr, sptr, sptr
; GetScrollBarInfo hwnd, idObject, varptr(psbi)   ; 戻り値は stat
; hwnd : HWND -> "sptr"
; idObject : OBJECT_IDENTIFIER -> "sptr"
; psbi : SCROLLBARINFO* in/out -> "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。

出力引数:

#uselib "USER32.dll"
#cfunc global GetScrollBarInfo "GetScrollBarInfo" sptr, int, var
; res = GetScrollBarInfo(hwnd, idObject, psbi)
; hwnd : HWND -> "sptr"
; idObject : OBJECT_IDENTIFIER -> "int"
; psbi : SCROLLBARINFO* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "USER32.dll"
#cfunc global GetScrollBarInfo "GetScrollBarInfo" sptr, int, sptr
; res = GetScrollBarInfo(hwnd, idObject, varptr(psbi))
; hwnd : HWND -> "sptr"
; idObject : OBJECT_IDENTIFIER -> "int"
; psbi : SCROLLBARINFO* in/out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; BOOL GetScrollBarInfo(HWND hwnd, OBJECT_IDENTIFIER idObject, SCROLLBARINFO* psbi)
#uselib "USER32.dll"
#cfunc global GetScrollBarInfo "GetScrollBarInfo" intptr, int, var
; res = GetScrollBarInfo(hwnd, idObject, psbi)
; hwnd : HWND -> "intptr"
; idObject : OBJECT_IDENTIFIER -> "int"
; psbi : SCROLLBARINFO* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; BOOL GetScrollBarInfo(HWND hwnd, OBJECT_IDENTIFIER idObject, SCROLLBARINFO* psbi)
#uselib "USER32.dll"
#cfunc global GetScrollBarInfo "GetScrollBarInfo" intptr, int, intptr
; res = GetScrollBarInfo(hwnd, idObject, varptr(psbi))
; hwnd : HWND -> "intptr"
; idObject : OBJECT_IDENTIFIER -> "int"
; psbi : SCROLLBARINFO* in/out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procGetScrollBarInfo = user32.NewProc("GetScrollBarInfo")
)

// hwnd (HWND), idObject (OBJECT_IDENTIFIER), psbi (SCROLLBARINFO* in/out)
r1, _, err := procGetScrollBarInfo.Call(
	uintptr(hwnd),
	uintptr(idObject),
	uintptr(psbi),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetScrollBarInfo(
  hwnd: THandle;   // HWND
  idObject: Integer;   // OBJECT_IDENTIFIER
  psbi: Pointer   // SCROLLBARINFO* in/out
): BOOL; stdcall;
  external 'USER32.dll' name 'GetScrollBarInfo';

result := DllCall("USER32\GetScrollBarInfo"
    , "Ptr", hwnd   ; HWND
    , "Int", idObject   ; OBJECT_IDENTIFIER
    , "Ptr", psbi   ; SCROLLBARINFO* in/out
    , "Int")   ; return: BOOL

●GetScrollBarInfo(hwnd, idObject, psbi) = DLL("USER32.dll", "bool GetScrollBarInfo(void*, int, void*)")
# 呼び出し: GetScrollBarInfo(hwnd, idObject, psbi)
# hwnd : HWND -> "void*"
# idObject : OBJECT_IDENTIFIER -> "int"
# psbi : SCROLLBARINFO* in/out -> "void*"
# 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)。