GetTextCharsetInfo

// GDI32.dll
#include <windows.h>

INT GetTextCharsetInfo(
    HDC hdc,
    FONTSIGNATURE* lpSig,   // optional
    DWORD dwFlags
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function GetTextCharsetInfo(
    hdc As IntPtr,   ' HDC
    lpSig As IntPtr,   ' FONTSIGNATURE* optional, out
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' hdc : HDC
' lpSig : FONTSIGNATURE* optional, out
' dwFlags : DWORD
Declare PtrSafe Function GetTextCharsetInfo Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal lpSig As LongPtr, _
    ByVal dwFlags As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetTextCharsetInfo = ctypes.windll.gdi32.GetTextCharsetInfo
GetTextCharsetInfo.restype = ctypes.c_int
GetTextCharsetInfo.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    ctypes.c_void_p,  # lpSig : FONTSIGNATURE* optional, out
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
GetTextCharsetInfo = Fiddle::Function.new(
  lib['GetTextCharsetInfo'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_VOIDP,  # lpSig : FONTSIGNATURE* optional, out
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn GetTextCharsetInfo(
        hdc: *mut core::ffi::c_void,  // HDC
        lpSig: *mut FONTSIGNATURE,  // FONTSIGNATURE* optional, out
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll")]
public static extern int GetTextCharsetInfo(IntPtr hdc, IntPtr lpSig, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_GetTextCharsetInfo' -Namespace Win32 -PassThru
# $api::GetTextCharsetInfo(hdc, lpSig, dwFlags)

#uselib "GDI32.dll"
#func global GetTextCharsetInfo "GetTextCharsetInfo" sptr, sptr, sptr
; GetTextCharsetInfo hdc, varptr(lpSig), dwFlags   ; 戻り値は stat
; hdc : HDC -> "sptr"
; lpSig : FONTSIGNATURE* optional, out -> "sptr"
; dwFlags : DWORD -> "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 GetTextCharsetInfo "GetTextCharsetInfo" sptr, var, int
; res = GetTextCharsetInfo(hdc, lpSig, dwFlags)
; hdc : HDC -> "sptr"
; lpSig : FONTSIGNATURE* optional, out -> "var"
; dwFlags : DWORD -> "int"
; ※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 GetTextCharsetInfo(HDC hdc, FONTSIGNATURE* lpSig, DWORD dwFlags)
#uselib "GDI32.dll"
#cfunc global GetTextCharsetInfo "GetTextCharsetInfo" intptr, var, int
; res = GetTextCharsetInfo(hdc, lpSig, dwFlags)
; hdc : HDC -> "intptr"
; lpSig : FONTSIGNATURE* optional, out -> "var"
; dwFlags : DWORD -> "int"
; ※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")
	procGetTextCharsetInfo = gdi32.NewProc("GetTextCharsetInfo")
)

// hdc (HDC), lpSig (FONTSIGNATURE* optional, out), dwFlags (DWORD)
r1, _, err := procGetTextCharsetInfo.Call(
	uintptr(hdc),
	uintptr(lpSig),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetTextCharsetInfo(
  hdc: THandle;   // HDC
  lpSig: Pointer;   // FONTSIGNATURE* optional, out
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'GDI32.dll' name 'GetTextCharsetInfo';

result := DllCall("GDI32\GetTextCharsetInfo"
    , "Ptr", hdc   ; HDC
    , "Ptr", lpSig   ; FONTSIGNATURE* optional, out
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: INT

●GetTextCharsetInfo(hdc, lpSig, dwFlags) = DLL("GDI32.dll", "int GetTextCharsetInfo(void*, void*, dword)")
# 呼び出し: GetTextCharsetInfo(hdc, lpSig, dwFlags)
# hdc : HDC -> "void*"
# lpSig : FONTSIGNATURE* optional, out -> "void*"
# dwFlags : DWORD -> "dword"
# 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)。