请问如何在这段代码的基础上，实现用鼠标拖动窗口缩放的同时保持生成的easyx图片按比例缩放，换言之，我该在代码中哪一部分插入easyx图片生成代码才能保证每次鼠标拖动缩放后图片按比例变化？由于该段代码来自问答区拷贝，所以如果有大佬有别的好方法能教教我也是完全可以的qwq：核心在于用easyx生成图片后在程序运行中实现窗口——图片的随时主动同步缩放功能，本人对Windowsapi之类的窗口编程差不多零基础，可能会有续问题价格再议

windows系统，vs2022编译

#include <windows.h>
#include <graphics.h>
#include <conio.h>
#include<iostream>
bool change_size = false;

int change_size_width;
int change_size_height;

WNDPROC EasyXProcess;

LRESULT MyWindowProcess(HWND handle, UINT message, WPARAM wparam, LPARAM lparam) {

	switch (message) {
	case WM_SIZING: {
		RECT* rect = (RECT*)lparam;
		
		change_size = true;

		change_size_width = rect->right - rect->left;
		change_size_height = rect->bottom - rect->top;
		setbkcolor(WHITE);
		int x0 = rect->left, y0 = rect->bottom;
		setlinecolor(BLACK);
		settextcolor(BLACK);
		cleardevice();
		setorigin(x0, y0);
		line(x0+20, y0-30, x0+1580, y0-30);
		return 0;
	}
	}

	return EasyXProcess(handle, message, wparam, lparam);
}

int main() {
	initgraph(900, 900);

	// 取消拖动改变大小限制
	SetWindowLong(GetHWnd(), GWL_STYLE, GetWindowLong(GetHWnd(), GWL_STYLE) | (WS_MAXIMIZEBOX));
	SetWindowLong(GetHWnd(), GWL_STYLE, (GetWindowLong(GetHWnd(), GWL_STYLE) | WS_THICKFRAME));

	EasyXProcess = reinterpret_cast<WNDPROC>(GetWindowLongPtr(GetHWnd(), GWLP_WNDPROC));

	SetWindowLongPtr(GetHWnd(), GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(MyWindowProcess));

	// 计时器
	time_t timer = clock();
	setbkcolor(WHITE);
	int x0 = getmaxx() - getmaxx(), y0 = getmaxy();
	setlinecolor(BLACK);
	settextcolor(BLACK);
	cleardevice();
	setorigin(x0, y0);
	line(20, -30, 1580, -30);
	BeginBatchDraw();
	FlushBatchDraw();

	while (true) {
		if (clock() - timer >= 38) {
			if (change_size == true) {
				change_size = false;

				Resize(NULL, change_size_width, change_size_height);

				cleardevice();
				FlushBatchDraw();
			}
		}
	}

	EndBatchDraw();

	_getch();

	return 0;
}