GetDIBits

// GDI32.dll
#include <windows.h>

INT GetDIBits(
    HDC hdc,
    HBITMAP hbm,
    DWORD start,
    DWORD cLines,
    void* lpvBits,   // optional
    BITMAPINFO* lpbmi,
    DIB_USAGE usage
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function GetDIBits(
    hdc As IntPtr,   ' HDC
    hbm As IntPtr,   ' HBITMAP
    start As UInteger,   ' DWORD
    cLines As UInteger,   ' DWORD
    lpvBits As IntPtr,   ' void* optional, out
    lpbmi As IntPtr,   ' BITMAPINFO* in/out
    usage As UInteger   ' DIB_USAGE
) As Integer
End Function

' hdc : HDC
' hbm : HBITMAP
' start : DWORD
' cLines : DWORD
' lpvBits : void* optional, out
' lpbmi : BITMAPINFO* in/out
' usage : DIB_USAGE
Declare PtrSafe Function GetDIBits Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal hbm As LongPtr, _
    ByVal start As Long, _
    ByVal cLines As Long, _
    ByVal lpvBits As LongPtr, _
    ByVal lpbmi As LongPtr, _
    ByVal usage 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

GetDIBits = ctypes.windll.gdi32.GetDIBits
GetDIBits.restype = ctypes.c_int
GetDIBits.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    wintypes.HANDLE,  # hbm : HBITMAP
    wintypes.DWORD,  # start : DWORD
    wintypes.DWORD,  # cLines : DWORD
    ctypes.POINTER(None),  # lpvBits : void* optional, out
    ctypes.c_void_p,  # lpbmi : BITMAPINFO* in/out
    wintypes.DWORD,  # usage : DIB_USAGE
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
GetDIBits = Fiddle::Function.new(
  lib['GetDIBits'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_VOIDP,  # hbm : HBITMAP
    -Fiddle::TYPE_INT,  # start : DWORD
    -Fiddle::TYPE_INT,  # cLines : DWORD
    Fiddle::TYPE_VOIDP,  # lpvBits : void* optional, out
    Fiddle::TYPE_VOIDP,  # lpbmi : BITMAPINFO* in/out
    -Fiddle::TYPE_INT,  # usage : DIB_USAGE
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn GetDIBits(
        hdc: *mut core::ffi::c_void,  // HDC
        hbm: *mut core::ffi::c_void,  // HBITMAP
        start: u32,  // DWORD
        cLines: u32,  // DWORD
        lpvBits: *mut (),  // void* optional, out
        lpbmi: *mut BITMAPINFO,  // BITMAPINFO* in/out
        usage: u32  // DIB_USAGE
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll")]
public static extern int GetDIBits(IntPtr hdc, IntPtr hbm, uint start, uint cLines, IntPtr lpvBits, IntPtr lpbmi, uint usage);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_GetDIBits' -Namespace Win32 -PassThru
# $api::GetDIBits(hdc, hbm, start, cLines, lpvBits, lpbmi, usage)

#uselib "GDI32.dll"
#func global GetDIBits "GetDIBits" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; GetDIBits hdc, hbm, start, cLines, lpvBits, varptr(lpbmi), usage   ; 戻り値は stat
; hdc : HDC -> "sptr"
; hbm : HBITMAP -> "sptr"
; start : DWORD -> "sptr"
; cLines : DWORD -> "sptr"
; lpvBits : void* optional, out -> "sptr"
; lpbmi : BITMAPINFO* in/out -> "sptr"
; usage : DIB_USAGE -> "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 "GDI32.dll"
#cfunc global GetDIBits "GetDIBits" sptr, sptr, int, int, sptr, var, int
; res = GetDIBits(hdc, hbm, start, cLines, lpvBits, lpbmi, usage)
; hdc : HDC -> "sptr"
; hbm : HBITMAP -> "sptr"
; start : DWORD -> "int"
; cLines : DWORD -> "int"
; lpvBits : void* optional, out -> "sptr"
; lpbmi : BITMAPINFO* in/out -> "var"
; usage : DIB_USAGE -> "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。

; INT GetDIBits(HDC hdc, HBITMAP hbm, DWORD start, DWORD cLines, void* lpvBits, BITMAPINFO* lpbmi, DIB_USAGE usage)
#uselib "GDI32.dll"
#cfunc global GetDIBits "GetDIBits" intptr, intptr, int, int, intptr, var, int
; res = GetDIBits(hdc, hbm, start, cLines, lpvBits, lpbmi, usage)
; hdc : HDC -> "intptr"
; hbm : HBITMAP -> "intptr"
; start : DWORD -> "int"
; cLines : DWORD -> "int"
; lpvBits : void* optional, out -> "intptr"
; lpbmi : BITMAPINFO* in/out -> "var"
; usage : DIB_USAGE -> "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 (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procGetDIBits = gdi32.NewProc("GetDIBits")
)

// hdc (HDC), hbm (HBITMAP), start (DWORD), cLines (DWORD), lpvBits (void* optional, out), lpbmi (BITMAPINFO* in/out), usage (DIB_USAGE)
r1, _, err := procGetDIBits.Call(
	uintptr(hdc),
	uintptr(hbm),
	uintptr(start),
	uintptr(cLines),
	uintptr(lpvBits),
	uintptr(lpbmi),
	uintptr(usage),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetDIBits(
  hdc: THandle;   // HDC
  hbm: THandle;   // HBITMAP
  start: DWORD;   // DWORD
  cLines: DWORD;   // DWORD
  lpvBits: Pointer;   // void* optional, out
  lpbmi: Pointer;   // BITMAPINFO* in/out
  usage: DWORD   // DIB_USAGE
): Integer; stdcall;
  external 'GDI32.dll' name 'GetDIBits';

result := DllCall("GDI32\GetDIBits"
    , "Ptr", hdc   ; HDC
    , "Ptr", hbm   ; HBITMAP
    , "UInt", start   ; DWORD
    , "UInt", cLines   ; DWORD
    , "Ptr", lpvBits   ; void* optional, out
    , "Ptr", lpbmi   ; BITMAPINFO* in/out
    , "UInt", usage   ; DIB_USAGE
    , "Int")   ; return: INT

●GetDIBits(hdc, hbm, start, cLines, lpvBits, lpbmi, usage) = DLL("GDI32.dll", "int GetDIBits(void*, void*, dword, dword, void*, void*, dword)")
# 呼び出し: GetDIBits(hdc, hbm, start, cLines, lpvBits, lpbmi, usage)
# hdc : HDC -> "void*"
# hbm : HBITMAP -> "void*"
# start : DWORD -> "dword"
# cLines : DWORD -> "dword"
# lpvBits : void* optional, out -> "void*"
# lpbmi : BITMAPINFO* in/out -> "void*"
# usage : DIB_USAGE -> "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)。