GdipGetPenDashOffset

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

Status GdipGetPenDashOffset(
    GpPen* pen,
    FLOAT* offset
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipGetPenDashOffset(
    pen As IntPtr,   ' GpPen* in/out
    ByRef offset As Single   ' FLOAT* in/out
) As Integer
End Function

' pen : GpPen* in/out
' offset : FLOAT* in/out
Declare PtrSafe Function GdipGetPenDashOffset Lib "gdiplus" ( _
    ByVal pen As LongPtr, _
    ByRef offset 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

GdipGetPenDashOffset = ctypes.windll.gdiplus.GdipGetPenDashOffset
GdipGetPenDashOffset.restype = ctypes.c_int
GdipGetPenDashOffset.argtypes = [
    ctypes.c_void_p,  # pen : GpPen* in/out
    ctypes.POINTER(ctypes.c_float),  # offset : FLOAT* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipGetPenDashOffset = Fiddle::Function.new(
  lib['GdipGetPenDashOffset'],
  [
    Fiddle::TYPE_VOIDP,  # pen : GpPen* in/out
    Fiddle::TYPE_VOIDP,  # offset : FLOAT* in/out
  ],
  Fiddle::TYPE_INT)

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

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

#uselib "gdiplus.dll"
#func global GdipGetPenDashOffset "GdipGetPenDashOffset" sptr, sptr
; GdipGetPenDashOffset varptr(pen), varptr(offset)   ; 戻り値は stat
; pen : GpPen* in/out -> "sptr"
; offset : 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 GdipGetPenDashOffset "GdipGetPenDashOffset" var, var
; res = GdipGetPenDashOffset(pen, offset)
; pen : GpPen* in/out -> "var"
; offset : 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 GdipGetPenDashOffset(GpPen* pen, FLOAT* offset)
#uselib "gdiplus.dll"
#cfunc global GdipGetPenDashOffset "GdipGetPenDashOffset" var, var
; res = GdipGetPenDashOffset(pen, offset)
; pen : GpPen* in/out -> "var"
; offset : 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")
	procGdipGetPenDashOffset = gdiplus.NewProc("GdipGetPenDashOffset")
)

// pen (GpPen* in/out), offset (FLOAT* in/out)
r1, _, err := procGdipGetPenDashOffset.Call(
	uintptr(pen),
	uintptr(offset),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipGetPenDashOffset(
  pen: Pointer;   // GpPen* in/out
  offset: Pointer   // FLOAT* in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipGetPenDashOffset';

result := DllCall("gdiplus\GdipGetPenDashOffset"
    , "Ptr", pen   ; GpPen* in/out
    , "Ptr", offset   ; FLOAT* in/out
    , "Int")   ; return: Status

●GdipGetPenDashOffset(pen, offset) = DLL("gdiplus.dll", "int GdipGetPenDashOffset(void*, void*)")
# 呼び出し: GdipGetPenDashOffset(pen, offset)
# pen : GpPen* in/out -> "void*"
# offset : 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)。