GetKerningPairsA

// GDI32.dll  (ANSI / -A)
#include <windows.h>

DWORD GetKerningPairsA(
    HDC hdc,
    DWORD nPairs,
    KERNINGPAIR* lpKernPair   // optional
);

<DllImport("GDI32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function GetKerningPairsA(
    hdc As IntPtr,   ' HDC
    nPairs As UInteger,   ' DWORD
    lpKernPair As IntPtr   ' KERNINGPAIR* optional, out
) As UInteger
End Function

' hdc : HDC
' nPairs : DWORD
' lpKernPair : KERNINGPAIR* optional, out
Declare PtrSafe Function GetKerningPairsA Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal nPairs As Long, _
    ByVal lpKernPair 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

GetKerningPairsA = ctypes.windll.gdi32.GetKerningPairsA
GetKerningPairsA.restype = wintypes.DWORD
GetKerningPairsA.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    wintypes.DWORD,  # nPairs : DWORD
    ctypes.c_void_p,  # lpKernPair : KERNINGPAIR* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
GetKerningPairsA = Fiddle::Function.new(
  lib['GetKerningPairsA'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    -Fiddle::TYPE_INT,  # nPairs : DWORD
    Fiddle::TYPE_VOIDP,  # lpKernPair : KERNINGPAIR* optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn GetKerningPairsA(
        hdc: *mut core::ffi::c_void,  // HDC
        nPairs: u32,  // DWORD
        lpKernPair: *mut KERNINGPAIR  // KERNINGPAIR* optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll", CharSet = CharSet.Ansi)]
public static extern uint GetKerningPairsA(IntPtr hdc, uint nPairs, IntPtr lpKernPair);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_GetKerningPairsA' -Namespace Win32 -PassThru
# $api::GetKerningPairsA(hdc, nPairs, lpKernPair)

#uselib "GDI32.dll"
#func global GetKerningPairsA "GetKerningPairsA" sptr, sptr, sptr
; GetKerningPairsA hdc, nPairs, varptr(lpKernPair)   ; 戻り値は stat
; hdc : HDC -> "sptr"
; nPairs : DWORD -> "sptr"
; lpKernPair : KERNINGPAIR* optional, 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 "GDI32.dll"
#cfunc global GetKerningPairsA "GetKerningPairsA" sptr, int, var
; res = GetKerningPairsA(hdc, nPairs, lpKernPair)
; hdc : HDC -> "sptr"
; nPairs : DWORD -> "int"
; lpKernPair : KERNINGPAIR* optional, 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。

; DWORD GetKerningPairsA(HDC hdc, DWORD nPairs, KERNINGPAIR* lpKernPair)
#uselib "GDI32.dll"
#cfunc global GetKerningPairsA "GetKerningPairsA" intptr, int, var
; res = GetKerningPairsA(hdc, nPairs, lpKernPair)
; hdc : HDC -> "intptr"
; nPairs : DWORD -> "int"
; lpKernPair : KERNINGPAIR* optional, 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 (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procGetKerningPairsA = gdi32.NewProc("GetKerningPairsA")
)

// hdc (HDC), nPairs (DWORD), lpKernPair (KERNINGPAIR* optional, out)
r1, _, err := procGetKerningPairsA.Call(
	uintptr(hdc),
	uintptr(nPairs),
	uintptr(lpKernPair),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function GetKerningPairsA(
  hdc: THandle;   // HDC
  nPairs: DWORD;   // DWORD
  lpKernPair: Pointer   // KERNINGPAIR* optional, out
): DWORD; stdcall;
  external 'GDI32.dll' name 'GetKerningPairsA';

result := DllCall("GDI32\GetKerningPairsA"
    , "Ptr", hdc   ; HDC
    , "UInt", nPairs   ; DWORD
    , "Ptr", lpKernPair   ; KERNINGPAIR* optional, out
    , "UInt")   ; return: DWORD

●GetKerningPairsA(hdc, nPairs, lpKernPair) = DLL("GDI32.dll", "dword GetKerningPairsA(void*, dword, void*)")
# 呼び出し: GetKerningPairsA(hdc, nPairs, lpKernPair)
# hdc : HDC -> "void*"
# nPairs : DWORD -> "dword"
# lpKernPair : KERNINGPAIR* optional, 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)。