HTBORDER in the border of a window that does not have a sizing border.
HTBORDER在不具有可变大小边框的窗口的边框上。
Also, the system disables the window's sizing border and the window-positioning capability of the title bar so that the user cannot move the window by dragging the title bar.
此外,系统会禁用窗口的可调整边框和标题栏的窗口定位功能,使用户无法通过拖动标题栏来移动窗口。
Position the pointer inside the selection border or anywhere on it except the sizing handles.
将指针置于选定内容边框内部或选定内容边框上除尺寸柄以外的任意位置。
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