VarR4CmpR8

// OLEAUT32.dll
#include <windows.h>

VARCMP VarR4CmpR8(
    FLOAT fltLeft,
    DOUBLE dblRight
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarR4CmpR8(
    fltLeft As Single,   ' FLOAT
    dblRight As Double   ' DOUBLE
) As UInteger
End Function

' fltLeft : FLOAT
' dblRight : DOUBLE
Declare PtrSafe Function VarR4CmpR8 Lib "oleaut32" ( _
    ByVal fltLeft As Single, _
    ByVal dblRight As Double) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

VarR4CmpR8 = ctypes.windll.oleaut32.VarR4CmpR8
VarR4CmpR8.restype = wintypes.DWORD
VarR4CmpR8.argtypes = [
    ctypes.c_float,  # fltLeft : FLOAT
    ctypes.c_double,  # dblRight : DOUBLE
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarR4CmpR8 = Fiddle::Function.new(
  lib['VarR4CmpR8'],
  [
    Fiddle::TYPE_FLOAT,  # fltLeft : FLOAT
    Fiddle::TYPE_DOUBLE,  # dblRight : DOUBLE
  ],
  -Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarR4CmpR8(
        fltLeft: f32,  // FLOAT
        dblRight: f64  // DOUBLE
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern uint VarR4CmpR8(float fltLeft, double dblRight);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarR4CmpR8' -Namespace Win32 -PassThru
# $api::VarR4CmpR8(fltLeft, dblRight)

#uselib "OLEAUT32.dll"
#func global VarR4CmpR8 "VarR4CmpR8" float, double
; VarR4CmpR8 fltLeft, dblRight   ; 戻り値は stat
; fltLeft : FLOAT -> "float"
; dblRight : DOUBLE -> "double"
; ※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 "OLEAUT32.dll"
#cfunc global VarR4CmpR8 "VarR4CmpR8" float, double
; res = VarR4CmpR8(fltLeft, dblRight)
; fltLeft : FLOAT -> "float"
; dblRight : DOUBLE -> "double"

; VARCMP VarR4CmpR8(FLOAT fltLeft, DOUBLE dblRight)
#uselib "OLEAUT32.dll"
#cfunc global VarR4CmpR8 "VarR4CmpR8" float, double
; res = VarR4CmpR8(fltLeft, dblRight)
; fltLeft : FLOAT -> "float"
; dblRight : DOUBLE -> "double"

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

var (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procVarR4CmpR8 = oleaut32.NewProc("VarR4CmpR8")
)

// fltLeft (FLOAT), dblRight (DOUBLE)
r1, _, err := procVarR4CmpR8.Call(
	uintptr(math.Float32bits(fltLeft)),
	uintptr(math.Float64bits(dblRight)),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // VARCMP
// 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。

function VarR4CmpR8(
  fltLeft: Single;   // FLOAT
  dblRight: Double   // DOUBLE
): DWORD; stdcall;
  external 'OLEAUT32.dll' name 'VarR4CmpR8';

result := DllCall("OLEAUT32\VarR4CmpR8"
    , "Float", fltLeft   ; FLOAT
    , "Double", dblRight   ; DOUBLE
    , "UInt")   ; return: VARCMP

●VarR4CmpR8(fltLeft, dblRight) = DLL("OLEAUT32.dll", "dword VarR4CmpR8(float, double)")
# 呼び出し: VarR4CmpR8(fltLeft, dblRight)
# fltLeft : FLOAT -> "float"
# dblRight : 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)。