GetTextMetricsW

// GDI32.dll  (Unicode / -W)
#include <windows.h>

BOOL GetTextMetricsW(
    HDC hdc,
    TEXTMETRICW* lptm
);

<DllImport("GDI32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function GetTextMetricsW(
    hdc As IntPtr,   ' HDC
    lptm As IntPtr   ' TEXTMETRICW* out
) As Boolean
End Function

' hdc : HDC
' lptm : TEXTMETRICW* out
Declare PtrSafe Function GetTextMetricsW Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal lptm As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetTextMetricsW = ctypes.windll.gdi32.GetTextMetricsW
GetTextMetricsW.restype = wintypes.BOOL
GetTextMetricsW.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    ctypes.c_void_p,  # lptm : TEXTMETRICW* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
GetTextMetricsW = Fiddle::Function.new(
  lib['GetTextMetricsW'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_VOIDP,  # lptm : TEXTMETRICW* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "gdi32")]
extern "system" {
    fn GetTextMetricsW(
        hdc: *mut core::ffi::c_void,  // HDC
        lptm: *mut TEXTMETRICW  // TEXTMETRICW* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("GDI32.dll", CharSet = CharSet.Unicode)]
public static extern bool GetTextMetricsW(IntPtr hdc, IntPtr lptm);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_GetTextMetricsW' -Namespace Win32 -PassThru
# $api::GetTextMetricsW(hdc, lptm)

#uselib "GDI32.dll"
#func global GetTextMetricsW "GetTextMetricsW" wptr, wptr
; GetTextMetricsW hdc, varptr(lptm)   ; 戻り値は stat
; hdc : HDC -> "wptr"
; lptm : TEXTMETRICW* out -> "wptr"
; ※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 GetTextMetricsW "GetTextMetricsW" sptr, var
; res = GetTextMetricsW(hdc, lptm)
; hdc : HDC -> "sptr"
; lptm : TEXTMETRICW* 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。

; BOOL GetTextMetricsW(HDC hdc, TEXTMETRICW* lptm)
#uselib "GDI32.dll"
#cfunc global GetTextMetricsW "GetTextMetricsW" intptr, var
; res = GetTextMetricsW(hdc, lptm)
; hdc : HDC -> "intptr"
; lptm : TEXTMETRICW* 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")
	procGetTextMetricsW = gdi32.NewProc("GetTextMetricsW")
)

// hdc (HDC), lptm (TEXTMETRICW* out)
r1, _, err := procGetTextMetricsW.Call(
	uintptr(hdc),
	uintptr(lptm),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetTextMetricsW(
  hdc: THandle;   // HDC
  lptm: Pointer   // TEXTMETRICW* out
): BOOL; stdcall;
  external 'GDI32.dll' name 'GetTextMetricsW';

result := DllCall("GDI32\GetTextMetricsW"
    , "Ptr", hdc   ; HDC
    , "Ptr", lptm   ; TEXTMETRICW* out
    , "Int")   ; return: BOOL

●GetTextMetricsW(hdc, lptm) = DLL("GDI32.dll", "bool GetTextMetricsW(void*, void*)")
# 呼び出し: GetTextMetricsW(hdc, lptm)
# hdc : HDC -> "void*"
# lptm : TEXTMETRICW* 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。