SymEnumProcesses

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

BOOL SymEnumProcesses(
    PSYM_ENUMPROCESSES_CALLBACK EnumProcessesCallback,
    void* UserContext
);

<DllImport("dbghelp.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SymEnumProcesses(
    EnumProcessesCallback As IntPtr,   ' PSYM_ENUMPROCESSES_CALLBACK
    UserContext As IntPtr   ' void*
) As Boolean
End Function

' EnumProcessesCallback : PSYM_ENUMPROCESSES_CALLBACK
' UserContext : void*
Declare PtrSafe Function SymEnumProcesses Lib "dbghelp" ( _
    ByVal EnumProcessesCallback As LongPtr, _
    ByVal UserContext As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SymEnumProcesses = ctypes.windll.dbghelp.SymEnumProcesses
SymEnumProcesses.restype = wintypes.BOOL
SymEnumProcesses.argtypes = [
    ctypes.c_void_p,  # EnumProcessesCallback : PSYM_ENUMPROCESSES_CALLBACK
    ctypes.POINTER(None),  # UserContext : void*
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dbghelp.dll')
SymEnumProcesses = Fiddle::Function.new(
  lib['SymEnumProcesses'],
  [
    Fiddle::TYPE_VOIDP,  # EnumProcessesCallback : PSYM_ENUMPROCESSES_CALLBACK
    Fiddle::TYPE_VOIDP,  # UserContext : void*
  ],
  Fiddle::TYPE_INT)

#[link(name = "dbghelp")]
extern "system" {
    fn SymEnumProcesses(
        EnumProcessesCallback: *const core::ffi::c_void,  // PSYM_ENUMPROCESSES_CALLBACK
        UserContext: *mut ()  // void*
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("dbghelp.dll", SetLastError = true)]
public static extern bool SymEnumProcesses(IntPtr EnumProcessesCallback, IntPtr UserContext);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dbghelp_SymEnumProcesses' -Namespace Win32 -PassThru
# $api::SymEnumProcesses(EnumProcessesCallback, UserContext)

#uselib "dbghelp.dll"
#func global SymEnumProcesses "SymEnumProcesses" sptr, sptr
; SymEnumProcesses EnumProcessesCallback, UserContext   ; 戻り値は stat
; EnumProcessesCallback : PSYM_ENUMPROCESSES_CALLBACK -> "sptr"
; UserContext : void* -> "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 "dbghelp.dll"
#cfunc global SymEnumProcesses "SymEnumProcesses" sptr, sptr
; res = SymEnumProcesses(EnumProcessesCallback, UserContext)
; EnumProcessesCallback : PSYM_ENUMPROCESSES_CALLBACK -> "sptr"
; UserContext : void* -> "sptr"

; BOOL SymEnumProcesses(PSYM_ENUMPROCESSES_CALLBACK EnumProcessesCallback, void* UserContext)
#uselib "dbghelp.dll"
#cfunc global SymEnumProcesses "SymEnumProcesses" intptr, intptr
; res = SymEnumProcesses(EnumProcessesCallback, UserContext)
; EnumProcessesCallback : PSYM_ENUMPROCESSES_CALLBACK -> "intptr"
; UserContext : void* -> "intptr"

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

var (
	dbghelp = windows.NewLazySystemDLL("dbghelp.dll")
	procSymEnumProcesses = dbghelp.NewProc("SymEnumProcesses")
)

// EnumProcessesCallback (PSYM_ENUMPROCESSES_CALLBACK), UserContext (void*)
r1, _, err := procSymEnumProcesses.Call(
	uintptr(EnumProcessesCallback),
	uintptr(UserContext),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SymEnumProcesses(
  EnumProcessesCallback: Pointer;   // PSYM_ENUMPROCESSES_CALLBACK
  UserContext: Pointer   // void*
): BOOL; stdcall;
  external 'dbghelp.dll' name 'SymEnumProcesses';

result := DllCall("dbghelp\SymEnumProcesses"
    , "Ptr", EnumProcessesCallback   ; PSYM_ENUMPROCESSES_CALLBACK
    , "Ptr", UserContext   ; void*
    , "Int")   ; return: BOOL

●SymEnumProcesses(EnumProcessesCallback, UserContext) = DLL("dbghelp.dll", "bool SymEnumProcesses(void*, void*)")
# 呼び出し: SymEnumProcesses(EnumProcessesCallback, UserContext)
# EnumProcessesCallback : PSYM_ENUMPROCESSES_CALLBACK -> "void*"
# UserContext : void* -> "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)。