KsGetMediaTypeCount

// ksproxy.ax
#include <windows.h>

HRESULT KsGetMediaTypeCount(
    HANDLE FilterHandle,
    DWORD PinFactoryId,
    DWORD* MediaTypeCount
);

<DllImport("ksproxy.ax", ExactSpelling:=True)>
Public Shared Function KsGetMediaTypeCount(
    FilterHandle As IntPtr,   ' HANDLE
    PinFactoryId As UInteger,   ' DWORD
    <Out> ByRef MediaTypeCount As UInteger   ' DWORD* out
) As Integer
End Function

' FilterHandle : HANDLE
' PinFactoryId : DWORD
' MediaTypeCount : DWORD* out
Declare PtrSafe Function KsGetMediaTypeCount Lib "ksproxy.ax" ( _
    ByVal FilterHandle As LongPtr, _
    ByVal PinFactoryId As Long, _
    ByRef MediaTypeCount 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

KsGetMediaTypeCount = ctypes.windll.LoadLibrary("ksproxy.ax").KsGetMediaTypeCount
KsGetMediaTypeCount.restype = ctypes.c_int
KsGetMediaTypeCount.argtypes = [
    wintypes.HANDLE,  # FilterHandle : HANDLE
    wintypes.DWORD,  # PinFactoryId : DWORD
    ctypes.POINTER(wintypes.DWORD),  # MediaTypeCount : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ksproxy.ax')
KsGetMediaTypeCount = Fiddle::Function.new(
  lib['KsGetMediaTypeCount'],
  [
    Fiddle::TYPE_VOIDP,  # FilterHandle : HANDLE
    -Fiddle::TYPE_INT,  # PinFactoryId : DWORD
    Fiddle::TYPE_VOIDP,  # MediaTypeCount : DWORD* out
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("ksproxy.ax")]
public static extern int KsGetMediaTypeCount(IntPtr FilterHandle, uint PinFactoryId, out uint MediaTypeCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ksproxy.ax_KsGetMediaTypeCount' -Namespace Win32 -PassThru
# $api::KsGetMediaTypeCount(FilterHandle, PinFactoryId, MediaTypeCount)

#uselib "ksproxy.ax"
#func global KsGetMediaTypeCount "KsGetMediaTypeCount" sptr, sptr, sptr
; KsGetMediaTypeCount FilterHandle, PinFactoryId, varptr(MediaTypeCount)   ; 戻り値は stat
; FilterHandle : HANDLE -> "sptr"
; PinFactoryId : DWORD -> "sptr"
; MediaTypeCount : 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。

#uselib "ksproxy.ax"
#cfunc global KsGetMediaTypeCount "KsGetMediaTypeCount" sptr, int, var
; res = KsGetMediaTypeCount(FilterHandle, PinFactoryId, MediaTypeCount)
; FilterHandle : HANDLE -> "sptr"
; PinFactoryId : DWORD -> "int"
; MediaTypeCount : 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 KsGetMediaTypeCount(HANDLE FilterHandle, DWORD PinFactoryId, DWORD* MediaTypeCount)
#uselib "ksproxy.ax"
#cfunc global KsGetMediaTypeCount "KsGetMediaTypeCount" intptr, int, var
; res = KsGetMediaTypeCount(FilterHandle, PinFactoryId, MediaTypeCount)
; FilterHandle : HANDLE -> "intptr"
; PinFactoryId : DWORD -> "int"
; MediaTypeCount : 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。

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

var (
	ksproxy_ax = windows.NewLazySystemDLL("ksproxy.ax")
	procKsGetMediaTypeCount = ksproxy_ax.NewProc("KsGetMediaTypeCount")
)

// FilterHandle (HANDLE), PinFactoryId (DWORD), MediaTypeCount (DWORD* out)
r1, _, err := procKsGetMediaTypeCount.Call(
	uintptr(FilterHandle),
	uintptr(PinFactoryId),
	uintptr(MediaTypeCount),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function KsGetMediaTypeCount(
  FilterHandle: THandle;   // HANDLE
  PinFactoryId: DWORD;   // DWORD
  MediaTypeCount: Pointer   // DWORD* out
): Integer; stdcall;
  external 'ksproxy.ax' name 'KsGetMediaTypeCount';

result := DllCall("ksproxy.ax\KsGetMediaTypeCount"
    , "Ptr", FilterHandle   ; HANDLE
    , "UInt", PinFactoryId   ; DWORD
    , "Ptr", MediaTypeCount   ; DWORD* out
    , "Int")   ; return: HRESULT

●KsGetMediaTypeCount(FilterHandle, PinFactoryId, MediaTypeCount) = DLL("ksproxy.ax", "int KsGetMediaTypeCount(void*, dword, void*)")
# 呼び出し: KsGetMediaTypeCount(FilterHandle, PinFactoryId, MediaTypeCount)
# FilterHandle : HANDLE -> "void*"
# PinFactoryId : DWORD -> "dword"
# MediaTypeCount : 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)。