关于用SetWindowPos设置窗口全屏的问题

Question

In my app, I want to keep my window full screen. So I added resizing window function when received WM_DISPLAYCHANGE event. In the resizing window function, I use EnumDisplayMonitors to get current size of monitor, the size is correct. Then I use SetWindowPos function to set my window size equal to the monitor. But after SetWindowPos called, I found my window is still a little smaller than the monitor size some time. It seems that the desktop is not ready enough. I also set SWP_NOSENDCHANGING flag in the SetWindowPos function but still not work. Is there any way to solve this problem?

Answer 1

The usual approach to make a window full screen is not by reacting dynamically to WM_DISPLAYCHANGE or query the display dimensions. The canonical way to make a window full screen is to set its style to WS_MAXIMIZE | WS_POPUP | WS_VISIBLE WS_MAXIMIZE | WS_POPUP | WS_VISIBLE WS_MAXIMIZE | WS_POPUP | WS_VISIBLE its extended style to WS_EX_TOPMOST using SetWindowLong , followed by a call to SetWindowPos with flag SWP_FRAMECHANGED , then maximize it with *ShowWindow with flags SW_SHOWMAXIMIZED`.