LoadLibraryA

// KERNEL32.dll  (ANSI / -A)
#include <windows.h>

HMODULE LoadLibraryA(
    LPCSTR lpLibFileName
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function LoadLibraryA(
    <MarshalAs(UnmanagedType.LPStr)> lpLibFileName As String   ' LPCSTR
) As IntPtr
End Function

' lpLibFileName : LPCSTR
Declare PtrSafe Function LoadLibraryA Lib "kernel32" ( _
    ByVal lpLibFileName As String) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

LoadLibraryA = ctypes.windll.kernel32.LoadLibraryA
LoadLibraryA.restype = ctypes.c_void_p
LoadLibraryA.argtypes = [
    wintypes.LPCSTR,  # lpLibFileName : LPCSTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
LoadLibraryA = Fiddle::Function.new(
  lib['LoadLibraryA'],
  [
    Fiddle::TYPE_VOIDP,  # lpLibFileName : LPCSTR
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "kernel32")]
extern "system" {
    fn LoadLibraryA(
        lpLibFileName: *const u8  // LPCSTR
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern IntPtr LoadLibraryA([MarshalAs(UnmanagedType.LPStr)] string lpLibFileName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_LoadLibraryA' -Namespace Win32 -PassThru
# $api::LoadLibraryA(lpLibFileName)

#uselib "KERNEL32.dll"
#func global LoadLibraryA "LoadLibraryA" sptr
; LoadLibraryA lpLibFileName   ; 戻り値は stat
; lpLibFileName : LPCSTR -> "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 "KERNEL32.dll"
#cfunc global LoadLibraryA "LoadLibraryA" str
; res = LoadLibraryA(lpLibFileName)
; lpLibFileName : LPCSTR -> "str"

; HMODULE LoadLibraryA(LPCSTR lpLibFileName)
#uselib "KERNEL32.dll"
#cfunc global LoadLibraryA "LoadLibraryA" str
; res = LoadLibraryA(lpLibFileName)
; lpLibFileName : LPCSTR -> "str"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procLoadLibraryA = kernel32.NewProc("LoadLibraryA")
)

// lpLibFileName (LPCSTR)
r1, _, err := procLoadLibraryA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpLibFileName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HMODULE

function LoadLibraryA(
  lpLibFileName: PAnsiChar   // LPCSTR
): THandle; stdcall;
  external 'KERNEL32.dll' name 'LoadLibraryA';

result := DllCall("KERNEL32\LoadLibraryA"
    , "AStr", lpLibFileName   ; LPCSTR
    , "Ptr")   ; return: HMODULE

●LoadLibraryA(lpLibFileName) = DLL("KERNEL32.dll", "void* LoadLibraryA(char*)")
# 呼び出し: LoadLibraryA(lpLibFileName)
# lpLibFileName : LPCSTR -> "char*"
# 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)。