有关WM_WINDOWPOSCHANGING消息的问题
我在研究WM_WINDOWPOSCHANGING消息时在delphi 6.0 的帮助中找到这样一段注解:
The WM_WINDOWPOSCHANGING message is sent to a window whose size, position, or place in the Z order is about to change as a result of a call to the SetWindowPos function or another window-management function.
WM_WINDOWPOSCHANGING
lpwp = (LPWINDOWPOS) lParam; // points to size and position data
Parameters
lpwp
Value of lParam. Points to a WINDOWPOS structure that contains information about the window's new size and position.
请问,LPWINDOWPOS类型在哪个单元中定义的
要在程序中使用LPWINDOWPOS,需要use 哪个单元?