ホーム › Devices.Display › GetCapabilitiesStringLength

GetCapabilitiesStringLength

関数

モニタの機能記述文字列の長さを取得する。

DLLdxva2.dll呼出規約winapiSetLastErrorあり対応OSWindows Vista 以降

シグネチャ

// dxva2.dll
#include <windows.h>

INT GetCapabilitiesStringLength(
    HANDLE hMonitor,
    DWORD* pdwCapabilitiesStringLengthInCharacters
);

パラメーター

名前	型	方向
hMonitor	HANDLE	in
pdwCapabilitiesStringLengthInCharacters	DWORD*	out

戻り値の型: INT

各言語での呼び出し定義

// dxva2.dll
#include <windows.h>

INT GetCapabilitiesStringLength(
    HANDLE hMonitor,
    DWORD* pdwCapabilitiesStringLengthInCharacters
);

[DllImport("dxva2.dll", SetLastError = true, ExactSpelling = true)]
static extern int GetCapabilitiesStringLength(
    IntPtr hMonitor,   // HANDLE
    out uint pdwCapabilitiesStringLengthInCharacters   // DWORD* out
);

<DllImport("dxva2.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetCapabilitiesStringLength(
    hMonitor As IntPtr,   ' HANDLE
    <Out> ByRef pdwCapabilitiesStringLengthInCharacters As UInteger   ' DWORD* out
) As Integer
End Function

' hMonitor : HANDLE
' pdwCapabilitiesStringLengthInCharacters : DWORD* out
Declare PtrSafe Function GetCapabilitiesStringLength Lib "dxva2" ( _
    ByVal hMonitor As LongPtr, _
    ByRef pdwCapabilitiesStringLengthInCharacters 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

GetCapabilitiesStringLength = ctypes.windll.dxva2.GetCapabilitiesStringLength
GetCapabilitiesStringLength.restype = ctypes.c_int
GetCapabilitiesStringLength.argtypes = [
    wintypes.HANDLE,  # hMonitor : HANDLE
    ctypes.POINTER(wintypes.DWORD),  # pdwCapabilitiesStringLengthInCharacters : DWORD* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dxva2.dll')
GetCapabilitiesStringLength = Fiddle::Function.new(
  lib['GetCapabilitiesStringLength'],
  [
    Fiddle::TYPE_VOIDP,  # hMonitor : HANDLE
    Fiddle::TYPE_VOIDP,  # pdwCapabilitiesStringLengthInCharacters : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "dxva2")]
extern "system" {
    fn GetCapabilitiesStringLength(
        hMonitor: *mut core::ffi::c_void,  // HANDLE
        pdwCapabilitiesStringLengthInCharacters: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dxva2.dll", SetLastError = true)]
public static extern int GetCapabilitiesStringLength(IntPtr hMonitor, out uint pdwCapabilitiesStringLengthInCharacters);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dxva2_GetCapabilitiesStringLength' -Namespace Win32 -PassThru
# $api::GetCapabilitiesStringLength(hMonitor, pdwCapabilitiesStringLengthInCharacters)

#uselib "dxva2.dll"
#func global GetCapabilitiesStringLength "GetCapabilitiesStringLength" sptr, sptr
; GetCapabilitiesStringLength hMonitor, varptr(pdwCapabilitiesStringLengthInCharacters)   ; 戻り値は stat
; hMonitor : HANDLE -> "sptr"
; pdwCapabilitiesStringLengthInCharacters : DWORD* 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。

出力引数:

#uselib "dxva2.dll"
#cfunc global GetCapabilitiesStringLength "GetCapabilitiesStringLength" sptr, var
; res = GetCapabilitiesStringLength(hMonitor, pdwCapabilitiesStringLengthInCharacters)
; hMonitor : HANDLE -> "sptr"
; pdwCapabilitiesStringLengthInCharacters : DWORD* 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。#uselib "dxva2.dll"
#cfunc global GetCapabilitiesStringLength "GetCapabilitiesStringLength" sptr, sptr
; res = GetCapabilitiesStringLength(hMonitor, varptr(pdwCapabilitiesStringLengthInCharacters))
; hMonitor : HANDLE -> "sptr"
; pdwCapabilitiesStringLengthInCharacters : DWORD* out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; INT GetCapabilitiesStringLength(HANDLE hMonitor, DWORD* pdwCapabilitiesStringLengthInCharacters)
#uselib "dxva2.dll"
#cfunc global GetCapabilitiesStringLength "GetCapabilitiesStringLength" intptr, var
; res = GetCapabilitiesStringLength(hMonitor, pdwCapabilitiesStringLengthInCharacters)
; hMonitor : HANDLE -> "intptr"
; pdwCapabilitiesStringLengthInCharacters : DWORD* 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 GetCapabilitiesStringLength(HANDLE hMonitor, DWORD* pdwCapabilitiesStringLengthInCharacters)
#uselib "dxva2.dll"
#cfunc global GetCapabilitiesStringLength "GetCapabilitiesStringLength" intptr, intptr
; res = GetCapabilitiesStringLength(hMonitor, varptr(pdwCapabilitiesStringLengthInCharacters))
; hMonitor : HANDLE -> "intptr"
; pdwCapabilitiesStringLengthInCharacters : DWORD* out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	dxva2 = windows.NewLazySystemDLL("dxva2.dll")
	procGetCapabilitiesStringLength = dxva2.NewProc("GetCapabilitiesStringLength")
)

// hMonitor (HANDLE), pdwCapabilitiesStringLengthInCharacters (DWORD* out)
r1, _, err := procGetCapabilitiesStringLength.Call(
	uintptr(hMonitor),
	uintptr(pdwCapabilitiesStringLengthInCharacters),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetCapabilitiesStringLength(
  hMonitor: THandle;   // HANDLE
  pdwCapabilitiesStringLengthInCharacters: Pointer   // DWORD* out
): Integer; stdcall;
  external 'dxva2.dll' name 'GetCapabilitiesStringLength';

result := DllCall("dxva2\GetCapabilitiesStringLength"
    , "Ptr", hMonitor   ; HANDLE
    , "Ptr", pdwCapabilitiesStringLengthInCharacters   ; DWORD* out
    , "Int")   ; return: INT

●GetCapabilitiesStringLength(hMonitor, pdwCapabilitiesStringLengthInCharacters) = DLL("dxva2.dll", "int GetCapabilitiesStringLength(void*, void*)")
# 呼び出し: GetCapabilitiesStringLength(hMonitor, pdwCapabilitiesStringLengthInCharacters)
# hMonitor : HANDLE -> "void*"
# pdwCapabilitiesStringLengthInCharacters : DWORD* 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)。