GdipGetImageHorizontalResolution

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

Status GdipGetImageHorizontalResolution(
    GpImage* image,
    FLOAT* resolution
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipGetImageHorizontalResolution(
    image As IntPtr,   ' GpImage* in/out
    ByRef resolution As Single   ' FLOAT* in/out
) As Integer
End Function

' image : GpImage* in/out
' resolution : FLOAT* in/out
Declare PtrSafe Function GdipGetImageHorizontalResolution Lib "gdiplus" ( _
    ByVal image As LongPtr, _
    ByRef resolution As Single) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GdipGetImageHorizontalResolution = ctypes.windll.gdiplus.GdipGetImageHorizontalResolution
GdipGetImageHorizontalResolution.restype = ctypes.c_int
GdipGetImageHorizontalResolution.argtypes = [
    ctypes.c_void_p,  # image : GpImage* in/out
    ctypes.POINTER(ctypes.c_float),  # resolution : FLOAT* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipGetImageHorizontalResolution = Fiddle::Function.new(
  lib['GdipGetImageHorizontalResolution'],
  [
    Fiddle::TYPE_VOIDP,  # image : GpImage* in/out
    Fiddle::TYPE_VOIDP,  # resolution : FLOAT* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipGetImageHorizontalResolution(
        image: *mut GpImage,  // GpImage* in/out
        resolution: *mut f32  // FLOAT* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipGetImageHorizontalResolution(IntPtr image, ref float resolution);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipGetImageHorizontalResolution' -Namespace Win32 -PassThru
# $api::GdipGetImageHorizontalResolution(image, resolution)

#uselib "gdiplus.dll"
#func global GdipGetImageHorizontalResolution "GdipGetImageHorizontalResolution" sptr, sptr
; GdipGetImageHorizontalResolution varptr(image), varptr(resolution)   ; 戻り値は stat
; image : GpImage* in/out -> "sptr"
; resolution : FLOAT* 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。

#uselib "gdiplus.dll"
#cfunc global GdipGetImageHorizontalResolution "GdipGetImageHorizontalResolution" var, var
; res = GdipGetImageHorizontalResolution(image, resolution)
; image : GpImage* in/out -> "var"
; resolution : FLOAT* 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。

; Status GdipGetImageHorizontalResolution(GpImage* image, FLOAT* resolution)
#uselib "gdiplus.dll"
#cfunc global GdipGetImageHorizontalResolution "GdipGetImageHorizontalResolution" var, var
; res = GdipGetImageHorizontalResolution(image, resolution)
; image : GpImage* in/out -> "var"
; resolution : FLOAT* 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。

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

var (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipGetImageHorizontalResolution = gdiplus.NewProc("GdipGetImageHorizontalResolution")
)

// image (GpImage* in/out), resolution (FLOAT* in/out)
r1, _, err := procGdipGetImageHorizontalResolution.Call(
	uintptr(image),
	uintptr(resolution),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipGetImageHorizontalResolution(
  image: Pointer;   // GpImage* in/out
  resolution: Pointer   // FLOAT* in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipGetImageHorizontalResolution';

result := DllCall("gdiplus\GdipGetImageHorizontalResolution"
    , "Ptr", image   ; GpImage* in/out
    , "Ptr", resolution   ; FLOAT* in/out
    , "Int")   ; return: Status

●GdipGetImageHorizontalResolution(image, resolution) = DLL("gdiplus.dll", "int GdipGetImageHorizontalResolution(void*, void*)")
# 呼び出し: GdipGetImageHorizontalResolution(image, resolution)
# image : GpImage* in/out -> "void*"
# resolution : FLOAT* 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)。