glDrawElements

// OPENGL32.dll
#include <windows.h>

void glDrawElements(
    DWORD mode,
    INT count,
    DWORD type,
    const void* indices
);

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Sub glDrawElements(
    mode As UInteger,   ' DWORD
    count As Integer,   ' INT
    type As UInteger,   ' DWORD
    indices As IntPtr   ' void*
)
End Sub

' mode : DWORD
' count : INT
' type : DWORD
' indices : void*
Declare PtrSafe Sub glDrawElements Lib "opengl32" ( _
    ByVal mode As Long, _
    ByVal count As Long, _
    ByVal type As Long, _
    ByVal indices As LongPtr)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

glDrawElements = ctypes.windll.opengl32.glDrawElements
glDrawElements.restype = None
glDrawElements.argtypes = [
    wintypes.DWORD,  # mode : DWORD
    ctypes.c_int,  # count : INT
    wintypes.DWORD,  # type : DWORD
    ctypes.POINTER(None),  # indices : void*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
glDrawElements = Fiddle::Function.new(
  lib['glDrawElements'],
  [
    -Fiddle::TYPE_INT,  # mode : DWORD
    Fiddle::TYPE_INT,  # count : INT
    -Fiddle::TYPE_INT,  # type : DWORD
    Fiddle::TYPE_VOIDP,  # indices : void*
  ],
  Fiddle::TYPE_VOID)

#[link(name = "opengl32")]
extern "system" {
    fn glDrawElements(
        mode: u32,  // DWORD
        count: i32,  // INT
        type: u32,  // DWORD
        indices: *const ()  // void*
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern void glDrawElements(uint mode, int count, uint type, IntPtr indices);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_glDrawElements' -Namespace Win32 -PassThru
# $api::glDrawElements(mode, count, type, indices)

#uselib "OPENGL32.dll"
#func global glDrawElements "glDrawElements" sptr, sptr, sptr, sptr
; glDrawElements mode, count, type, indices
; mode : DWORD -> "sptr"
; count : INT -> "sptr"
; type : DWORD -> "sptr"
; indices : void* -> "sptr"

#uselib "OPENGL32.dll"
#func global glDrawElements "glDrawElements" int, int, int, sptr
; glDrawElements mode, count, type, indices
; mode : DWORD -> "int"
; count : INT -> "int"
; type : DWORD -> "int"
; indices : void* -> "sptr"

; void glDrawElements(DWORD mode, INT count, DWORD type, void* indices)
#uselib "OPENGL32.dll"
#func global glDrawElements "glDrawElements" int, int, int, intptr
; glDrawElements mode, count, type, indices
; mode : DWORD -> "int"
; count : INT -> "int"
; type : DWORD -> "int"
; indices : void* -> "intptr"

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procglDrawElements = opengl32.NewProc("glDrawElements")
)

// mode (DWORD), count (INT), type (DWORD), indices (void*)
r1, _, err := procglDrawElements.Call(
	uintptr(mode),
	uintptr(count),
	uintptr(type),
	uintptr(indices),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure glDrawElements(
  mode: DWORD;   // DWORD
  count: Integer;   // INT
  type: DWORD;   // DWORD
  indices: Pointer   // void*
); stdcall;
  external 'OPENGL32.dll' name 'glDrawElements';

result := DllCall("OPENGL32\glDrawElements"
    , "UInt", mode   ; DWORD
    , "Int", count   ; INT
    , "UInt", type   ; DWORD
    , "Ptr", indices   ; void*
    , "Int")   ; return: void

●glDrawElements(mode, count, type, indices) = DLL("OPENGL32.dll", "int glDrawElements(dword, int, dword, void*)")
# 呼び出し: glDrawElements(mode, count, type, indices)
# mode : DWORD -> "dword"
# count : INT -> "int"
# type : DWORD -> "dword"
# indices : 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)。