GdipGraphicsClear

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

Status GdipGraphicsClear(
    GpGraphics* graphics,
    DWORD color
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipGraphicsClear(
    graphics As IntPtr,   ' GpGraphics* in/out
    color As UInteger   ' DWORD
) As Integer
End Function

' graphics : GpGraphics* in/out
' color : DWORD
Declare PtrSafe Function GdipGraphicsClear Lib "gdiplus" ( _
    ByVal graphics As LongPtr, _
    ByVal color As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GdipGraphicsClear = ctypes.windll.gdiplus.GdipGraphicsClear
GdipGraphicsClear.restype = ctypes.c_int
GdipGraphicsClear.argtypes = [
    ctypes.c_void_p,  # graphics : GpGraphics* in/out
    wintypes.DWORD,  # color : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipGraphicsClear = Fiddle::Function.new(
  lib['GdipGraphicsClear'],
  [
    Fiddle::TYPE_VOIDP,  # graphics : GpGraphics* in/out
    -Fiddle::TYPE_INT,  # color : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipGraphicsClear(
        graphics: *mut GpGraphics,  // GpGraphics* in/out
        color: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipGraphicsClear(IntPtr graphics, uint color);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipGraphicsClear' -Namespace Win32 -PassThru
# $api::GdipGraphicsClear(graphics, color)

#uselib "gdiplus.dll"
#func global GdipGraphicsClear "GdipGraphicsClear" sptr, sptr
; GdipGraphicsClear varptr(graphics), color   ; 戻り値は stat
; graphics : GpGraphics* in/out -> "sptr"
; color : DWORD -> "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 "gdiplus.dll"
#cfunc global GdipGraphicsClear "GdipGraphicsClear" var, int
; res = GdipGraphicsClear(graphics, color)
; graphics : GpGraphics* in/out -> "var"
; color : DWORD -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; Status GdipGraphicsClear(GpGraphics* graphics, DWORD color)
#uselib "gdiplus.dll"
#cfunc global GdipGraphicsClear "GdipGraphicsClear" var, int
; res = GdipGraphicsClear(graphics, color)
; graphics : GpGraphics* in/out -> "var"
; color : DWORD -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipGraphicsClear = gdiplus.NewProc("GdipGraphicsClear")
)

// graphics (GpGraphics* in/out), color (DWORD)
r1, _, err := procGdipGraphicsClear.Call(
	uintptr(graphics),
	uintptr(color),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipGraphicsClear(
  graphics: Pointer;   // GpGraphics* in/out
  color: DWORD   // DWORD
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipGraphicsClear';

result := DllCall("gdiplus\GdipGraphicsClear"
    , "Ptr", graphics   ; GpGraphics* in/out
    , "UInt", color   ; DWORD
    , "Int")   ; return: Status

●GdipGraphicsClear(graphics, color) = DLL("gdiplus.dll", "int GdipGraphicsClear(void*, dword)")
# 呼び出し: GdipGraphicsClear(graphics, color)
# graphics : GpGraphics* in/out -> "void*"
# color : DWORD -> "dword"
# 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)。