GdipSetPathGradientCenterColor

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

Status GdipSetPathGradientCenterColor(
    GpPathGradient* brush,
    DWORD colors
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipSetPathGradientCenterColor(
    brush As IntPtr,   ' GpPathGradient* in/out
    colors As UInteger   ' DWORD
) As Integer
End Function

' brush : GpPathGradient* in/out
' colors : DWORD
Declare PtrSafe Function GdipSetPathGradientCenterColor Lib "gdiplus" ( _
    ByVal brush As LongPtr, _
    ByVal colors 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

GdipSetPathGradientCenterColor = ctypes.windll.gdiplus.GdipSetPathGradientCenterColor
GdipSetPathGradientCenterColor.restype = ctypes.c_int
GdipSetPathGradientCenterColor.argtypes = [
    ctypes.c_void_p,  # brush : GpPathGradient* in/out
    wintypes.DWORD,  # colors : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipSetPathGradientCenterColor = Fiddle::Function.new(
  lib['GdipSetPathGradientCenterColor'],
  [
    Fiddle::TYPE_VOIDP,  # brush : GpPathGradient* in/out
    -Fiddle::TYPE_INT,  # colors : DWORD
  ],
  Fiddle::TYPE_INT)

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

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

#uselib "gdiplus.dll"
#func global GdipSetPathGradientCenterColor "GdipSetPathGradientCenterColor" sptr, sptr
; GdipSetPathGradientCenterColor varptr(brush), colors   ; 戻り値は stat
; brush : GpPathGradient* in/out -> "sptr"
; colors : 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 GdipSetPathGradientCenterColor "GdipSetPathGradientCenterColor" var, int
; res = GdipSetPathGradientCenterColor(brush, colors)
; brush : GpPathGradient* in/out -> "var"
; colors : 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 GdipSetPathGradientCenterColor(GpPathGradient* brush, DWORD colors)
#uselib "gdiplus.dll"
#cfunc global GdipSetPathGradientCenterColor "GdipSetPathGradientCenterColor" var, int
; res = GdipSetPathGradientCenterColor(brush, colors)
; brush : GpPathGradient* in/out -> "var"
; colors : 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")
	procGdipSetPathGradientCenterColor = gdiplus.NewProc("GdipSetPathGradientCenterColor")
)

// brush (GpPathGradient* in/out), colors (DWORD)
r1, _, err := procGdipSetPathGradientCenterColor.Call(
	uintptr(brush),
	uintptr(colors),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipSetPathGradientCenterColor(
  brush: Pointer;   // GpPathGradient* in/out
  colors: DWORD   // DWORD
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipSetPathGradientCenterColor';

result := DllCall("gdiplus\GdipSetPathGradientCenterColor"
    , "Ptr", brush   ; GpPathGradient* in/out
    , "UInt", colors   ; DWORD
    , "Int")   ; return: Status

●GdipSetPathGradientCenterColor(brush, colors) = DLL("gdiplus.dll", "int GdipSetPathGradientCenterColor(void*, dword)")
# 呼び出し: GdipSetPathGradientCenterColor(brush, colors)
# brush : GpPathGradient* in/out -> "void*"
# colors : 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)。