glClearDepth

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

void glClearDepth(
    DOUBLE depth
);

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Sub glClearDepth(
    depth As Double   ' DOUBLE
)
End Sub

' depth : DOUBLE
Declare PtrSafe Sub glClearDepth Lib "opengl32" ( _
    ByVal depth As Double)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

glClearDepth = ctypes.windll.opengl32.glClearDepth
glClearDepth.restype = None
glClearDepth.argtypes = [
    ctypes.c_double,  # depth : DOUBLE
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
glClearDepth = Fiddle::Function.new(
  lib['glClearDepth'],
  [
    Fiddle::TYPE_DOUBLE,  # depth : DOUBLE
  ],
  Fiddle::TYPE_VOID)

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

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern void glClearDepth(double depth);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_glClearDepth' -Namespace Win32 -PassThru
# $api::glClearDepth(depth)

#uselib "OPENGL32.dll"
#func global glClearDepth "glClearDepth" double
; glClearDepth depth
; depth : DOUBLE -> "double"

#uselib "OPENGL32.dll"
#func global glClearDepth "glClearDepth" double
; glClearDepth depth
; depth : DOUBLE -> "double"

; void glClearDepth(DOUBLE depth)
#uselib "OPENGL32.dll"
#func global glClearDepth "glClearDepth" double
; glClearDepth depth
; depth : DOUBLE -> "double"

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procglClearDepth = opengl32.NewProc("glClearDepth")
)

// depth (DOUBLE)
r1, _, err := procglClearDepth.Call(
	uintptr(math.Float64bits(depth)),
)
_ = 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 glClearDepth(
  depth: Double   // DOUBLE
); stdcall;
  external 'OPENGL32.dll' name 'glClearDepth';

result := DllCall("OPENGL32\glClearDepth"
    , "Double", depth   ; DOUBLE
    , "Int")   ; return: void

●glClearDepth(depth) = DLL("OPENGL32.dll", "int glClearDepth(double)")
# 呼び出し: glClearDepth(depth)
# depth : 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)。