DeleteObject

関数

指定したGDIオブジェクトを削除しリソースを解放する。

DLLGDI32.dll呼出規約winapi対応OSWindows 2000 以降

シグネチャ

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

BOOL DeleteObject(
    HGDIOBJ ho
);

パラメーター

名前	型	方向
ho	HGDIOBJ	in

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL DeleteObject(
    HGDIOBJ ho
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("GDI32.dll", ExactSpelling = true)]
static extern bool DeleteObject(
    IntPtr ho   // HGDIOBJ
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function DeleteObject(
    ho As IntPtr   ' HGDIOBJ
) As Boolean
End Function

' ho : HGDIOBJ
Declare PtrSafe Function DeleteObject Lib "gdi32" ( _
    ByVal ho 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

DeleteObject = ctypes.windll.gdi32.DeleteObject
DeleteObject.restype = wintypes.BOOL
DeleteObject.argtypes = [
    wintypes.HANDLE,  # ho : HGDIOBJ
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
DeleteObject = Fiddle::Function.new(
  lib['DeleteObject'],
  [
    Fiddle::TYPE_VOIDP,  # ho : HGDIOBJ
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("GDI32.dll")]
public static extern bool DeleteObject(IntPtr ho);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_DeleteObject' -Namespace Win32 -PassThru
# $api::DeleteObject(ho)

#uselib "GDI32.dll"
#func global DeleteObject "DeleteObject" sptr
; DeleteObject ho   ; 戻り値は stat
; ho : 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 DeleteObject "DeleteObject" sptr
; res = DeleteObject(ho)
; ho : HGDIOBJ -> "sptr"

; BOOL DeleteObject(HGDIOBJ ho)
#uselib "GDI32.dll"
#cfunc global DeleteObject "DeleteObject" intptr
; res = DeleteObject(ho)
; ho : HGDIOBJ -> "intptr"

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

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procDeleteObject = gdi32.NewProc("DeleteObject")
)

// ho (HGDIOBJ)
r1, _, err := procDeleteObject.Call(
	uintptr(ho),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function DeleteObject(
  ho: THandle   // HGDIOBJ
): BOOL; stdcall;
  external 'GDI32.dll' name 'DeleteObject';

result := DllCall("GDI32\DeleteObject"
    , "Ptr", ho   ; HGDIOBJ
    , "Int")   ; return: BOOL

●DeleteObject(ho) = DLL("GDI32.dll", "bool DeleteObject(void*)")
# 呼び出し: DeleteObject(ho)
# ho : 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)。