Win32 API 日本語リファレンス
ホームGraphics.Gdi › SetViewportExtEx

SetViewportExtEx

関数
ビューポートの範囲(拡大率)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>

BOOL SetViewportExtEx(
    HDC hdc,
    INT x,
    INT y,
    SIZE* lpsz   // optional
);

パラメーター

名前方向
hdcHDCin
xINTin
yINTin
lpszSIZE*outoptional

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL SetViewportExtEx(
    HDC hdc,
    INT x,
    INT y,
    SIZE* lpsz   // optional
);
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("GDI32.dll", ExactSpelling = true)]
static extern bool SetViewportExtEx(
    IntPtr hdc,   // HDC
    int x,   // INT
    int y,   // INT
    IntPtr lpsz   // SIZE* optional, out
);
<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function SetViewportExtEx(
    hdc As IntPtr,   ' HDC
    x As Integer,   ' INT
    y As Integer,   ' INT
    lpsz As IntPtr   ' SIZE* optional, out
) As Boolean
End Function
' hdc : HDC
' x : INT
' y : INT
' lpsz : SIZE* optional, out
Declare PtrSafe Function SetViewportExtEx Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal x As Long, _
    ByVal y As Long, _
    ByVal lpsz 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

SetViewportExtEx = ctypes.windll.gdi32.SetViewportExtEx
SetViewportExtEx.restype = wintypes.BOOL
SetViewportExtEx.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    ctypes.c_int,  # x : INT
    ctypes.c_int,  # y : INT
    ctypes.c_void_p,  # lpsz : SIZE* optional, out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
SetViewportExtEx = Fiddle::Function.new(
  lib['SetViewportExtEx'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_INT,  # x : INT
    Fiddle::TYPE_INT,  # y : INT
    Fiddle::TYPE_VOIDP,  # lpsz : SIZE* optional, out
  ],
  Fiddle::TYPE_INT)
#[link(name = "gdi32")]
extern "system" {
    fn SetViewportExtEx(
        hdc: *mut core::ffi::c_void,  // HDC
        x: i32,  // INT
        y: i32,  // INT
        lpsz: *mut SIZE  // SIZE* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("GDI32.dll")]
public static extern bool SetViewportExtEx(IntPtr hdc, int x, int y, IntPtr lpsz);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_SetViewportExtEx' -Namespace Win32 -PassThru
# $api::SetViewportExtEx(hdc, x, y, lpsz)
#uselib "GDI32.dll"
#func global SetViewportExtEx "SetViewportExtEx" sptr, sptr, sptr, sptr
; SetViewportExtEx hdc, x, y, varptr(lpsz)   ; 戻り値は stat
; hdc : HDC -> "sptr"
; x : INT -> "sptr"
; y : INT -> "sptr"
; lpsz : SIZE* optional, 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 "GDI32.dll"
#cfunc global SetViewportExtEx "SetViewportExtEx" sptr, int, int, var
; res = SetViewportExtEx(hdc, x, y, lpsz)
; hdc : HDC -> "sptr"
; x : INT -> "int"
; y : INT -> "int"
; lpsz : SIZE* optional, 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。
出力引数:
; BOOL SetViewportExtEx(HDC hdc, INT x, INT y, SIZE* lpsz)
#uselib "GDI32.dll"
#cfunc global SetViewportExtEx "SetViewportExtEx" intptr, int, int, var
; res = SetViewportExtEx(hdc, x, y, lpsz)
; hdc : HDC -> "intptr"
; x : INT -> "int"
; y : INT -> "int"
; lpsz : SIZE* optional, 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。
import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procSetViewportExtEx = gdi32.NewProc("SetViewportExtEx")
)

// hdc (HDC), x (INT), y (INT), lpsz (SIZE* optional, out)
r1, _, err := procSetViewportExtEx.Call(
	uintptr(hdc),
	uintptr(x),
	uintptr(y),
	uintptr(lpsz),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL
function SetViewportExtEx(
  hdc: THandle;   // HDC
  x: Integer;   // INT
  y: Integer;   // INT
  lpsz: Pointer   // SIZE* optional, out
): BOOL; stdcall;
  external 'GDI32.dll' name 'SetViewportExtEx';
result := DllCall("GDI32\SetViewportExtEx"
    , "Ptr", hdc   ; HDC
    , "Int", x   ; INT
    , "Int", y   ; INT
    , "Ptr", lpsz   ; SIZE* optional, out
    , "Int")   ; return: BOOL
●SetViewportExtEx(hdc, x, y, lpsz) = DLL("GDI32.dll", "bool SetViewportExtEx(void*, int, int, void*)")
# 呼び出し: SetViewportExtEx(hdc, x, y, lpsz)
# hdc : HDC -> "void*"
# x : INT -> "int"
# y : INT -> "int"
# lpsz : SIZE* optional, 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)。