SelectObject

関数

デバイスコンテキストにGDIオブジェクトを選択し、同種の前のオブジェクトを返す。

DLLGDI32.dll呼出規約winapi対応OSWindows 2000 以降

シグネチャ

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

HGDIOBJ SelectObject(
    HDC hdc,
    HGDIOBJ h
);

パラメーター

名前	型	方向
hdc	HDC	in
h	HGDIOBJ	in

戻り値の型: HGDIOBJ

各言語での呼び出し定義

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

HGDIOBJ SelectObject(
    HDC hdc,
    HGDIOBJ h
);

[DllImport("GDI32.dll", ExactSpelling = true)]
static extern IntPtr SelectObject(
    IntPtr hdc,   // HDC
    IntPtr h   // HGDIOBJ
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function SelectObject(
    hdc As IntPtr,   ' HDC
    h As IntPtr   ' HGDIOBJ
) As IntPtr
End Function

' hdc : HDC
' h : HGDIOBJ
Declare PtrSafe Function SelectObject Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal h As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SelectObject = ctypes.windll.gdi32.SelectObject
SelectObject.restype = ctypes.c_void_p
SelectObject.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    wintypes.HANDLE,  # h : HGDIOBJ
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
SelectObject = Fiddle::Function.new(
  lib['SelectObject'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_VOIDP,  # h : HGDIOBJ
  ],
  Fiddle::TYPE_VOIDP)

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

$sig = @"
[DllImport("GDI32.dll")]
public static extern IntPtr SelectObject(IntPtr hdc, IntPtr h);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_SelectObject' -Namespace Win32 -PassThru
# $api::SelectObject(hdc, h)

#uselib "GDI32.dll"
#func global SelectObject "SelectObject" sptr, sptr
; SelectObject hdc, h   ; 戻り値は stat
; hdc : HDC -> "sptr"
; h : HGDIOBJ -> "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 SelectObject "SelectObject" sptr, sptr
; res = SelectObject(hdc, h)
; hdc : HDC -> "sptr"
; h : HGDIOBJ -> "sptr"

; HGDIOBJ SelectObject(HDC hdc, HGDIOBJ h)
#uselib "GDI32.dll"
#cfunc global SelectObject "SelectObject" intptr, intptr
; res = SelectObject(hdc, h)
; hdc : HDC -> "intptr"
; h : HGDIOBJ -> "intptr"

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

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procSelectObject = gdi32.NewProc("SelectObject")
)

// hdc (HDC), h (HGDIOBJ)
r1, _, err := procSelectObject.Call(
	uintptr(hdc),
	uintptr(h),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HGDIOBJ

function SelectObject(
  hdc: THandle;   // HDC
  h: THandle   // HGDIOBJ
): THandle; stdcall;
  external 'GDI32.dll' name 'SelectObject';

result := DllCall("GDI32\SelectObject"
    , "Ptr", hdc   ; HDC
    , "Ptr", h   ; HGDIOBJ
    , "Ptr")   ; return: HGDIOBJ

●SelectObject(hdc, h) = DLL("GDI32.dll", "void* SelectObject(void*, void*)")
# 呼び出し: SelectObject(hdc, h)
# hdc : HDC -> "void*"
# h : HGDIOBJ -> "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)。