通过句柄置顶窗口

const UINT swpFlags = SWP_NOMOVE | SWP_NOSIZE | SWP_NOOWNERZORDER;
SetWindowPos(hwnd/*句柄*/, HWND_TOPMOST, 0, 0, 0, 0, swpFlags);

const UINT swpFlags = SWP_NOMOVE | SWP_NOSIZE | SWP_NOOWNERZORDER;
SetWindowPos(hwnd/*句柄*/, HWND_NOTOPMOST, 0, 0, 0, 0, swpFlags);