SHGetDriveMedia

関数

ドライブが対応するメディアの種類を取得する。

DLLSHELL32.dll呼出規約winapi対応OSWindows Vista 以降

シグネチャ

// SHELL32.dll
#include <windows.h>

HRESULT SHGetDriveMedia(
    LPCWSTR pszDrive,
    DWORD* pdwMediaContent
);

パラメーター

名前	型	方向
pszDrive	LPCWSTR	in
pdwMediaContent	DWORD*	out

戻り値の型: HRESULT

各言語での呼び出し定義

// SHELL32.dll
#include <windows.h>

HRESULT SHGetDriveMedia(
    LPCWSTR pszDrive,
    DWORD* pdwMediaContent
);

[DllImport("SHELL32.dll", ExactSpelling = true)]
static extern int SHGetDriveMedia(
    [MarshalAs(UnmanagedType.LPWStr)] string pszDrive,   // LPCWSTR
    out uint pdwMediaContent   // DWORD* out
);

<DllImport("SHELL32.dll", ExactSpelling:=True)>
Public Shared Function SHGetDriveMedia(
    <MarshalAs(UnmanagedType.LPWStr)> pszDrive As String,   ' LPCWSTR
    <Out> ByRef pdwMediaContent As UInteger   ' DWORD* out
) As Integer
End Function

' pszDrive : LPCWSTR
' pdwMediaContent : DWORD* out
Declare PtrSafe Function SHGetDriveMedia Lib "shell32" ( _
    ByVal pszDrive As LongPtr, _
    ByRef pdwMediaContent 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

SHGetDriveMedia = ctypes.windll.shell32.SHGetDriveMedia
SHGetDriveMedia.restype = ctypes.c_int
SHGetDriveMedia.argtypes = [
    wintypes.LPCWSTR,  # pszDrive : LPCWSTR
    ctypes.POINTER(wintypes.DWORD),  # pdwMediaContent : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
SHGetDriveMedia = Fiddle::Function.new(
  lib['SHGetDriveMedia'],
  [
    Fiddle::TYPE_VOIDP,  # pszDrive : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pdwMediaContent : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "shell32")]
extern "system" {
    fn SHGetDriveMedia(
        pszDrive: *const u16,  // LPCWSTR
        pdwMediaContent: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHELL32.dll")]
public static extern int SHGetDriveMedia([MarshalAs(UnmanagedType.LPWStr)] string pszDrive, out uint pdwMediaContent);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_SHGetDriveMedia' -Namespace Win32 -PassThru
# $api::SHGetDriveMedia(pszDrive, pdwMediaContent)

#uselib "SHELL32.dll"
#func global SHGetDriveMedia "SHGetDriveMedia" sptr, sptr
; SHGetDriveMedia pszDrive, varptr(pdwMediaContent)   ; 戻り値は stat
; pszDrive : LPCWSTR -> "sptr"
; pdwMediaContent : 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 "SHELL32.dll"
#cfunc global SHGetDriveMedia "SHGetDriveMedia" wstr, var
; res = SHGetDriveMedia(pszDrive, pdwMediaContent)
; pszDrive : LPCWSTR -> "wstr"
; pdwMediaContent : 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 "SHELL32.dll"
#cfunc global SHGetDriveMedia "SHGetDriveMedia" wstr, sptr
; res = SHGetDriveMedia(pszDrive, varptr(pdwMediaContent))
; pszDrive : LPCWSTR -> "wstr"
; pdwMediaContent : 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:

; HRESULT SHGetDriveMedia(LPCWSTR pszDrive, DWORD* pdwMediaContent)
#uselib "SHELL32.dll"
#cfunc global SHGetDriveMedia "SHGetDriveMedia" wstr, var
; res = SHGetDriveMedia(pszDrive, pdwMediaContent)
; pszDrive : LPCWSTR -> "wstr"
; pdwMediaContent : 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。; HRESULT SHGetDriveMedia(LPCWSTR pszDrive, DWORD* pdwMediaContent)
#uselib "SHELL32.dll"
#cfunc global SHGetDriveMedia "SHGetDriveMedia" wstr, intptr
; res = SHGetDriveMedia(pszDrive, varptr(pdwMediaContent))
; pszDrive : LPCWSTR -> "wstr"
; pdwMediaContent : 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 (
	shell32 = windows.NewLazySystemDLL("SHELL32.dll")
	procSHGetDriveMedia = shell32.NewProc("SHGetDriveMedia")
)

// pszDrive (LPCWSTR), pdwMediaContent (DWORD* out)
r1, _, err := procSHGetDriveMedia.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszDrive))),
	uintptr(pdwMediaContent),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function SHGetDriveMedia(
  pszDrive: PWideChar;   // LPCWSTR
  pdwMediaContent: Pointer   // DWORD* out
): Integer; stdcall;
  external 'SHELL32.dll' name 'SHGetDriveMedia';

result := DllCall("SHELL32\SHGetDriveMedia"
    , "WStr", pszDrive   ; LPCWSTR
    , "Ptr", pdwMediaContent   ; DWORD* out
    , "Int")   ; return: HRESULT

●SHGetDriveMedia(pszDrive, pdwMediaContent) = DLL("SHELL32.dll", "int SHGetDriveMedia(char*, void*)")
# 呼び出し: SHGetDriveMedia(pszDrive, pdwMediaContent)
# pszDrive : LPCWSTR -> "char*"
# pdwMediaContent : 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)。