WinAPI

#define ISOLATION_AWARE_ENABLED 1

#include "stdafx.h"
#include "Process.h"
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <tchar.h>
#include "Windows.h"
#include "commctrl.h"
#include "resource.h"

static HINSTANCE mainInstance;

int MyButtonId = 1000;
LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

BOOL APIENTRY DllMain(HMODULE hModule, DWORD  ul_reason_for_call, LPVOID lpReserved)
{
    mainInstance = hModule;

    WNDCLASSEX wc = { 0 };
    HWND MainHwnd;
    MSG Msg;

    wc.cbSize = sizeof(wc);
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = WindowProc;
    wc.hInstance = mainInstance;

    wc.hbrBackground = (HBRUSH)(CreateSolidBrush(RGB(30, 30, 30)));
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;

    wc.lpszMenuName = NULL;
    wc.lpszClassName = "Application";

    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    wc.hCursor = LoadCursor(NULL, IDC_ARROW);


    if (!RegisterClassEx(&wc))
    {
        MessageBox(NULL, std::to_string(GetLastError()).c_str(), "RegisterClassEx!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

    MainHwnd = CreateWindowEx(
        WS_EX_CLIENTEDGE,
        "Application",
        "My Application",
        WS_SYSMENU | WS_OVERLAPPED | WS_CAPTION | WS_MINIMIZEBOX,
        CW_USEDEFAULT, CW_USEDEFAULT, 400, 280,
        NULL, NULL, mainInstance, NULL);

    if (MainHwnd == NULL)
    {
        MessageBox(NULL, std::to_string(GetLastError()).c_str(), "CreateWindow!",
            MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

    ShowWindow(MainHwnd, 1);
    UpdateWindow(MainHwnd);

    while (GetMessage(&Msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&Msg);
        DispatchMessage(&Msg);
    }

    return TRUE;
}

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
    case WM_CREATE: {
        MyButton = CreateWindow("BUTTON", "A Button Text", WS_VISIBLE | WS_CHILD | BS_BITMAP | BS_FLAT, 17, 18, 110, 30, hwnd, (HMENU)PickButtonId, mainInstance, NULL);

        ///////// --->

        // Here I'm using one of these :

        // Using LoadImage()
        MyImage = (HBITMAP)LoadImage(hInstance, "UI\\myimage.bmp", IMAGE_BITMAP, 0, 0, LR_DEFAULTCOLOR | LR_DEFAULTSIZE | LR_LOADFROMFILE);

        // Using LoadBitmap() | My_Bitmap is an image resource name
        MyImage = LoadBitmap(hInstance, MAKEINTRESOURCE(My_Bitmap));

        ///////// <---

        SendMessage(MyButton, BM_SETIMAGE, (WPARAM)IMAGE_BITMAP, (LPARAM)MyImage);

        break;
    }

    default:
        return DefWindowProc(hwnd, uMsg, wParam, lParam);
    }
}