SetArcDirection

関数

円弧や矩形を描画する際の回転方向を設定する。

DLLGDI32.dll呼出規約winapi対応OSWindows 2000 以降

シグネチャ

// GDI32.dll
#include <windows.h>

INT SetArcDirection(
    HDC hdc,
    ARC_DIRECTION dir
);

パラメーター

名前	型	方向	説明
hdc	HDC	in	対象デバイスコンテキストのハンドル。
dir	ARC_DIRECTION	in	円弧や矩形の描画方向。AD_COUNTERCLOCKWISEまたはAD_CLOCKWISEを指定する。

戻り値の型: INT

各言語での呼び出し定義

// GDI32.dll
#include <windows.h>

INT SetArcDirection(
    HDC hdc,
    ARC_DIRECTION dir
);

[DllImport("GDI32.dll", ExactSpelling = true)]
static extern int SetArcDirection(
    IntPtr hdc,   // HDC
    int dir   // ARC_DIRECTION
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function SetArcDirection(
    hdc As IntPtr,   ' HDC
    dir As Integer   ' ARC_DIRECTION
) As Integer
End Function

' hdc : HDC
' dir : ARC_DIRECTION
Declare PtrSafe Function SetArcDirection Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal dir 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

SetArcDirection = ctypes.windll.gdi32.SetArcDirection
SetArcDirection.restype = ctypes.c_int
SetArcDirection.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    ctypes.c_int,  # dir : ARC_DIRECTION
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
SetArcDirection = Fiddle::Function.new(
  lib['SetArcDirection'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_INT,  # dir : ARC_DIRECTION
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn SetArcDirection(
        hdc: *mut core::ffi::c_void,  // HDC
        dir: i32  // ARC_DIRECTION
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll")]
public static extern int SetArcDirection(IntPtr hdc, int dir);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_SetArcDirection' -Namespace Win32 -PassThru
# $api::SetArcDirection(hdc, dir)

#uselib "GDI32.dll"
#func global SetArcDirection "SetArcDirection" sptr, sptr
; SetArcDirection hdc, dir   ; 戻り値は stat
; hdc : HDC -> "sptr"
; dir : ARC_DIRECTION -> "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 "GDI32.dll"
#cfunc global SetArcDirection "SetArcDirection" sptr, int
; res = SetArcDirection(hdc, dir)
; hdc : HDC -> "sptr"
; dir : ARC_DIRECTION -> "int"

; INT SetArcDirection(HDC hdc, ARC_DIRECTION dir)
#uselib "GDI32.dll"
#cfunc global SetArcDirection "SetArcDirection" intptr, int
; res = SetArcDirection(hdc, dir)
; hdc : HDC -> "intptr"
; dir : ARC_DIRECTION -> "int"

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

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procSetArcDirection = gdi32.NewProc("SetArcDirection")
)

// hdc (HDC), dir (ARC_DIRECTION)
r1, _, err := procSetArcDirection.Call(
	uintptr(hdc),
	uintptr(dir),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SetArcDirection(
  hdc: THandle;   // HDC
  dir: Integer   // ARC_DIRECTION
): Integer; stdcall;
  external 'GDI32.dll' name 'SetArcDirection';

result := DllCall("GDI32\SetArcDirection"
    , "Ptr", hdc   ; HDC
    , "Int", dir   ; ARC_DIRECTION
    , "Int")   ; return: INT

●SetArcDirection(hdc, dir) = DLL("GDI32.dll", "int SetArcDirection(void*, int)")
# 呼び出し: SetArcDirection(hdc, dir)
# hdc : HDC -> "void*"
# dir : ARC_DIRECTION -> "int"
# 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)。