winform的messagebox自动关闭的解决办法

1、引包

     [DllImport("user32.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)]
         private extern static IntPtr FindWindow(string lpClassName, string lpWindowName);
     
     [DllImport("user32.dll", CharSet = CharSet.Auto)]
     public static extern int PostMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);
     
     public const int WM_CLOSE = 0x10;

2、方法

MessageBox.Show(“测试一下”,“error”);

  IntPtr ptr = FindWindow(null, "error");
  if (ptr != IntPtr.Zero)
  {
    PostMessage(ptr, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
   }