GetTextFaceW

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

INT GetTextFaceW(
    HDC hdc,
    INT c,
    LPWSTR lpName   // optional
);

<DllImport("GDI32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function GetTextFaceW(
    hdc As IntPtr,   ' HDC
    c As Integer,   ' INT
    <MarshalAs(UnmanagedType.LPWStr)> lpName As System.Text.StringBuilder   ' LPWSTR optional, out
) As Integer
End Function

' hdc : HDC
' c : INT
' lpName : LPWSTR optional, out
Declare PtrSafe Function GetTextFaceW Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal c As Long, _
    ByVal lpName 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

GetTextFaceW = ctypes.windll.gdi32.GetTextFaceW
GetTextFaceW.restype = ctypes.c_int
GetTextFaceW.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    ctypes.c_int,  # c : INT
    wintypes.LPWSTR,  # lpName : LPWSTR optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
GetTextFaceW = Fiddle::Function.new(
  lib['GetTextFaceW'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_INT,  # c : INT
    Fiddle::TYPE_VOIDP,  # lpName : LPWSTR optional, out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "gdi32")]
extern "system" {
    fn GetTextFaceW(
        hdc: *mut core::ffi::c_void,  // HDC
        c: i32,  // INT
        lpName: *mut u16  // LPWSTR optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll", CharSet = CharSet.Unicode)]
public static extern int GetTextFaceW(IntPtr hdc, int c, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_GetTextFaceW' -Namespace Win32 -PassThru
# $api::GetTextFaceW(hdc, c, lpName)

#uselib "GDI32.dll"
#func global GetTextFaceW "GetTextFaceW" wptr, wptr, wptr
; GetTextFaceW hdc, c, varptr(lpName)   ; 戻り値は stat
; hdc : HDC -> "wptr"
; c : INT -> "wptr"
; lpName : LPWSTR optional, 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 GetTextFaceW "GetTextFaceW" sptr, int, var
; res = GetTextFaceW(hdc, c, lpName)
; hdc : HDC -> "sptr"
; c : INT -> "int"
; lpName : LPWSTR 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。

; INT GetTextFaceW(HDC hdc, INT c, LPWSTR lpName)
#uselib "GDI32.dll"
#cfunc global GetTextFaceW "GetTextFaceW" intptr, int, var
; res = GetTextFaceW(hdc, c, lpName)
; hdc : HDC -> "intptr"
; c : INT -> "int"
; lpName : LPWSTR 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")
	procGetTextFaceW = gdi32.NewProc("GetTextFaceW")
)

// hdc (HDC), c (INT), lpName (LPWSTR optional, out)
r1, _, err := procGetTextFaceW.Call(
	uintptr(hdc),
	uintptr(c),
	uintptr(lpName),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetTextFaceW(
  hdc: THandle;   // HDC
  c: Integer;   // INT
  lpName: PWideChar   // LPWSTR optional, out
): Integer; stdcall;
  external 'GDI32.dll' name 'GetTextFaceW';

result := DllCall("GDI32\GetTextFaceW"
    , "Ptr", hdc   ; HDC
    , "Int", c   ; INT
    , "Ptr", lpName   ; LPWSTR optional, out
    , "Int")   ; return: INT

●GetTextFaceW(hdc, c, lpName) = DLL("GDI32.dll", "int GetTextFaceW(void*, int, char*)")
# 呼び出し: GetTextFaceW(hdc, c, lpName)
# hdc : HDC -> "void*"
# c : INT -> "int"
# lpName : LPWSTR optional, out -> "char*"
# 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。