TEXT_SOURCE

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct TEXT_SOURCE
{
    public IntPtr pfnFillTextBuffer;
    public IntPtr awcBuffer;
    public uint iEnd;
    public uint iCur;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure TEXT_SOURCE
    Public pfnFillTextBuffer As IntPtr
    Public awcBuffer As IntPtr
    Public iEnd As UInteger
    Public iCur As UInteger
End Structure

import ctypes
from ctypes import wintypes

class TEXT_SOURCE(ctypes.Structure):
    _fields_ = [
        ("pfnFillTextBuffer", ctypes.c_void_p),
        ("awcBuffer", ctypes.c_void_p),
        ("iEnd", wintypes.DWORD),
        ("iCur", wintypes.DWORD),
    ]

#[repr(C)]
pub struct TEXT_SOURCE {
    pub pfnFillTextBuffer: *mut core::ffi::c_void,
    pub awcBuffer: *mut core::ffi::c_void,
    pub iEnd: u32,
    pub iCur: u32,
}

import "golang.org/x/sys/windows"

type TEXT_SOURCE struct {
	pfnFillTextBuffer uintptr
	awcBuffer uintptr
	iEnd uint32
	iCur uint32
}

type
  TEXT_SOURCE = record
    pfnFillTextBuffer: Pointer;
    awcBuffer: Pointer;
    iEnd: DWORD;
    iCur: DWORD;
  end;

const TEXT_SOURCE = extern struct {
    pfnFillTextBuffer: ?*anyopaque,
    awcBuffer: ?*anyopaque,
    iEnd: u32,
    iCur: u32,
};

type
  TEXT_SOURCE {.bycopy.} = object
    pfnFillTextBuffer: pointer
    awcBuffer: pointer
    iEnd: uint32
    iCur: uint32

struct TEXT_SOURCE
{
    void* pfnFillTextBuffer;
    void* awcBuffer;
    uint iEnd;
    uint iCur;
}