Win32中的窗口边框宽度和高度 - 我如何获得它？

#include<windows.h>
#include<iostream>

int main() {
    int borderWidth = GetSystemMetrics(SM_CXFRAME) + GetSystemMetrics(SM_CXPADDEDBORDER);
    int borderHeight = GetSystemMetrics(SM_CYFRAME) + GetSystemMetrics(SM_CXPADDEDBORDER);

    std::cout << "窗口边框宽度: "<< borderWidth<< std::endl;
    std::cout << "窗口边框高度: "<< borderHeight<< std::endl;

    return 0;
}