GetProcessImageFileNameA

// PSAPI.dll  (ANSI / -A)
#include <windows.h>

DWORD GetProcessImageFileNameA(
    HANDLE hProcess,
    LPSTR lpImageFileName,
    DWORD nSize
);

<DllImport("PSAPI.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetProcessImageFileNameA(
    hProcess As IntPtr,   ' HANDLE
    <MarshalAs(UnmanagedType.LPStr)> lpImageFileName As System.Text.StringBuilder,   ' LPSTR out
    nSize As UInteger   ' DWORD
) As UInteger
End Function

' hProcess : HANDLE
' lpImageFileName : LPSTR out
' nSize : DWORD
Declare PtrSafe Function GetProcessImageFileNameA Lib "psapi" ( _
    ByVal hProcess As LongPtr, _
    ByVal lpImageFileName As String, _
    ByVal nSize 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

GetProcessImageFileNameA = ctypes.windll.psapi.GetProcessImageFileNameA
GetProcessImageFileNameA.restype = wintypes.DWORD
GetProcessImageFileNameA.argtypes = [
    wintypes.HANDLE,  # hProcess : HANDLE
    wintypes.LPSTR,  # lpImageFileName : LPSTR out
    wintypes.DWORD,  # nSize : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('PSAPI.dll')
GetProcessImageFileNameA = Fiddle::Function.new(
  lib['GetProcessImageFileNameA'],
  [
    Fiddle::TYPE_VOIDP,  # hProcess : HANDLE
    Fiddle::TYPE_VOIDP,  # lpImageFileName : LPSTR out
    -Fiddle::TYPE_INT,  # nSize : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "psapi")]
extern "system" {
    fn GetProcessImageFileNameA(
        hProcess: *mut core::ffi::c_void,  // HANDLE
        lpImageFileName: *mut u8,  // LPSTR out
        nSize: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("PSAPI.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern uint GetProcessImageFileNameA(IntPtr hProcess, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder lpImageFileName, uint nSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'PSAPI_GetProcessImageFileNameA' -Namespace Win32 -PassThru
# $api::GetProcessImageFileNameA(hProcess, lpImageFileName, nSize)

#uselib "PSAPI.dll"
#func global GetProcessImageFileNameA "GetProcessImageFileNameA" sptr, sptr, sptr
; GetProcessImageFileNameA hProcess, varptr(lpImageFileName), nSize   ; 戻り値は stat
; hProcess : HANDLE -> "sptr"
; lpImageFileName : LPSTR out -> "sptr"
; nSize : 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 "PSAPI.dll"
#cfunc global GetProcessImageFileNameA "GetProcessImageFileNameA" sptr, var, int
; res = GetProcessImageFileNameA(hProcess, lpImageFileName, nSize)
; hProcess : HANDLE -> "sptr"
; lpImageFileName : LPSTR out -> "var"
; nSize : 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。

; DWORD GetProcessImageFileNameA(HANDLE hProcess, LPSTR lpImageFileName, DWORD nSize)
#uselib "PSAPI.dll"
#cfunc global GetProcessImageFileNameA "GetProcessImageFileNameA" intptr, var, int
; res = GetProcessImageFileNameA(hProcess, lpImageFileName, nSize)
; hProcess : HANDLE -> "intptr"
; lpImageFileName : LPSTR out -> "var"
; nSize : 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 (
	psapi = windows.NewLazySystemDLL("PSAPI.dll")
	procGetProcessImageFileNameA = psapi.NewProc("GetProcessImageFileNameA")
)

// hProcess (HANDLE), lpImageFileName (LPSTR out), nSize (DWORD)
r1, _, err := procGetProcessImageFileNameA.Call(
	uintptr(hProcess),
	uintptr(lpImageFileName),
	uintptr(nSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function GetProcessImageFileNameA(
  hProcess: THandle;   // HANDLE
  lpImageFileName: PAnsiChar;   // LPSTR out
  nSize: DWORD   // DWORD
): DWORD; stdcall;
  external 'PSAPI.dll' name 'GetProcessImageFileNameA';

result := DllCall("PSAPI\GetProcessImageFileNameA"
    , "Ptr", hProcess   ; HANDLE
    , "Ptr", lpImageFileName   ; LPSTR out
    , "UInt", nSize   ; DWORD
    , "UInt")   ; return: DWORD

●GetProcessImageFileNameA(hProcess, lpImageFileName, nSize) = DLL("PSAPI.dll", "dword GetProcessImageFileNameA(void*, char*, dword)")
# 呼び出し: GetProcessImageFileNameA(hProcess, lpImageFileName, nSize)
# hProcess : HANDLE -> "void*"
# lpImageFileName : LPSTR out -> "char*"
# nSize : 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)。