glColor4d

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

void glColor4d(
    DOUBLE red,
    DOUBLE green,
    DOUBLE blue,
    DOUBLE alpha
);

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Sub glColor4d(
    red As Double,   ' DOUBLE
    green As Double,   ' DOUBLE
    blue As Double,   ' DOUBLE
    alpha As Double   ' DOUBLE
)
End Sub

' red : DOUBLE
' green : DOUBLE
' blue : DOUBLE
' alpha : DOUBLE
Declare PtrSafe Sub glColor4d Lib "opengl32" ( _
    ByVal red As Double, _
    ByVal green As Double, _
    ByVal blue As Double, _
    ByVal alpha As Double)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

glColor4d = ctypes.windll.opengl32.glColor4d
glColor4d.restype = None
glColor4d.argtypes = [
    ctypes.c_double,  # red : DOUBLE
    ctypes.c_double,  # green : DOUBLE
    ctypes.c_double,  # blue : DOUBLE
    ctypes.c_double,  # alpha : DOUBLE
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
glColor4d = Fiddle::Function.new(
  lib['glColor4d'],
  [
    Fiddle::TYPE_DOUBLE,  # red : DOUBLE
    Fiddle::TYPE_DOUBLE,  # green : DOUBLE
    Fiddle::TYPE_DOUBLE,  # blue : DOUBLE
    Fiddle::TYPE_DOUBLE,  # alpha : DOUBLE
  ],
  Fiddle::TYPE_VOID)

#[link(name = "opengl32")]
extern "system" {
    fn glColor4d(
        red: f64,  // DOUBLE
        green: f64,  // DOUBLE
        blue: f64,  // DOUBLE
        alpha: f64  // DOUBLE
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern void glColor4d(double red, double green, double blue, double alpha);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_glColor4d' -Namespace Win32 -PassThru
# $api::glColor4d(red, green, blue, alpha)

#uselib "OPENGL32.dll"
#func global glColor4d "glColor4d" double, double, double, double
; glColor4d red, green, blue, alpha
; red : DOUBLE -> "double"
; green : DOUBLE -> "double"
; blue : DOUBLE -> "double"
; alpha : DOUBLE -> "double"

#uselib "OPENGL32.dll"
#func global glColor4d "glColor4d" double, double, double, double
; glColor4d red, green, blue, alpha
; red : DOUBLE -> "double"
; green : DOUBLE -> "double"
; blue : DOUBLE -> "double"
; alpha : DOUBLE -> "double"

; void glColor4d(DOUBLE red, DOUBLE green, DOUBLE blue, DOUBLE alpha)
#uselib "OPENGL32.dll"
#func global glColor4d "glColor4d" double, double, double, double
; glColor4d red, green, blue, alpha
; red : DOUBLE -> "double"
; green : DOUBLE -> "double"
; blue : DOUBLE -> "double"
; alpha : DOUBLE -> "double"

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procglColor4d = opengl32.NewProc("glColor4d")
)

// red (DOUBLE), green (DOUBLE), blue (DOUBLE), alpha (DOUBLE)
r1, _, err := procglColor4d.Call(
	uintptr(math.Float64bits(red)),
	uintptr(math.Float64bits(green)),
	uintptr(math.Float64bits(blue)),
	uintptr(math.Float64bits(alpha)),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void
// 注意: float/double 引数は proc.Call では XMM レジスタに渡せません。
// windows.SyscallN(proc.Addr(), math.Float64bits(x), ...) もしくは cgo を使用してください。

procedure glColor4d(
  red: Double;   // DOUBLE
  green: Double;   // DOUBLE
  blue: Double;   // DOUBLE
  alpha: Double   // DOUBLE
); stdcall;
  external 'OPENGL32.dll' name 'glColor4d';

result := DllCall("OPENGL32\glColor4d"
    , "Double", red   ; DOUBLE
    , "Double", green   ; DOUBLE
    , "Double", blue   ; DOUBLE
    , "Double", alpha   ; DOUBLE
    , "Int")   ; return: void

●glColor4d(red, green, blue, alpha) = DLL("OPENGL32.dll", "int glColor4d(double, double, double, double)")
# 呼び出し: glColor4d(red, green, blue, alpha)
# red : DOUBLE -> "double"
# green : DOUBLE -> "double"
# blue : DOUBLE -> "double"
# alpha : DOUBLE -> "double"
# 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)。