GdipGetFontSize

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

Status GdipGetFontSize(
    GpFont* font,
    FLOAT* size
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipGetFontSize(
    font As IntPtr,   ' GpFont* in/out
    ByRef size As Single   ' FLOAT* in/out
) As Integer
End Function

' font : GpFont* in/out
' size : FLOAT* in/out
Declare PtrSafe Function GdipGetFontSize Lib "gdiplus" ( _
    ByVal font As LongPtr, _
    ByRef size 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

GdipGetFontSize = ctypes.windll.gdiplus.GdipGetFontSize
GdipGetFontSize.restype = ctypes.c_int
GdipGetFontSize.argtypes = [
    ctypes.c_void_p,  # font : GpFont* in/out
    ctypes.POINTER(ctypes.c_float),  # size : FLOAT* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipGetFontSize = Fiddle::Function.new(
  lib['GdipGetFontSize'],
  [
    Fiddle::TYPE_VOIDP,  # font : GpFont* in/out
    Fiddle::TYPE_VOIDP,  # size : FLOAT* in/out
  ],
  Fiddle::TYPE_INT)

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

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

#uselib "gdiplus.dll"
#func global GdipGetFontSize "GdipGetFontSize" sptr, sptr
; GdipGetFontSize varptr(font), varptr(size)   ; 戻り値は stat
; font : GpFont* in/out -> "sptr"
; size : 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 GdipGetFontSize "GdipGetFontSize" var, var
; res = GdipGetFontSize(font, size)
; font : GpFont* in/out -> "var"
; size : 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 GdipGetFontSize(GpFont* font, FLOAT* size)
#uselib "gdiplus.dll"
#cfunc global GdipGetFontSize "GdipGetFontSize" var, var
; res = GdipGetFontSize(font, size)
; font : GpFont* in/out -> "var"
; size : 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")
	procGdipGetFontSize = gdiplus.NewProc("GdipGetFontSize")
)

// font (GpFont* in/out), size (FLOAT* in/out)
r1, _, err := procGdipGetFontSize.Call(
	uintptr(font),
	uintptr(size),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipGetFontSize(
  font: Pointer;   // GpFont* in/out
  size: Pointer   // FLOAT* in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipGetFontSize';

result := DllCall("gdiplus\GdipGetFontSize"
    , "Ptr", font   ; GpFont* in/out
    , "Ptr", size   ; FLOAT* in/out
    , "Int")   ; return: Status

●GdipGetFontSize(font, size) = DLL("gdiplus.dll", "int GdipGetFontSize(void*, void*)")
# 呼び出し: GdipGetFontSize(font, size)
# font : GpFont* in/out -> "void*"
# size : 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)。