// 显示堆叠的窗口
TileWindows(NULL, MDITILE_HORIZONTAL, NULL, 0, NULL);
// 并排显示窗口
TileWindows(NULL, MDITILE_VERTICAL, NULL, 0, NULL);
// 层叠窗口
CascadeWindows(NULL, MDITILE_ZORDER, NULL, 0, NULL);
API相关函数
https://learn.microsoft.com/zh-CN/windows/win32/api/winuser/nf-winuser-tilewindows
文章参考
https://bbs.csdn.net/topics/340039756