差很多!Invalidate The client area is ed for painting when the next WM_PAINT message occurs.UpdateWindow This function updates the client area of the specified window by sending a WM_PAINT message to the window if the window's update region is not empty. UpdateWindow sends a WM_PAINT message directly to the window procedure of the specified window, bypassing the application queue. If the update region is empty, no message is sent. Invalidate是标记窗口无效,和ValidateRect,ValidateRgn差不多。 UpdateWindow的作用是,如果存在无效区域,则发送WM_PAINT消息。
The client area is ed for painting when the next WM_PAINT message occurs.UpdateWindow
This function updates the client area of the specified window by sending a WM_PAINT message to the window if the window's update region is not empty. UpdateWindow sends a WM_PAINT message directly to the window procedure of the specified window, bypassing the application queue. If the update region is empty, no message is sent. Invalidate是标记窗口无效,和ValidateRect,ValidateRgn差不多。
UpdateWindow的作用是,如果存在无效区域,则发送WM_PAINT消息。