Namespace LzmTW.uSystem.uWindows.uForms.uMainForm
    Public Class SplashScreenHelper
        Friend Delegate Sub MessageSendingHandler(ByVal sender As Object, ByVal Message As String)
        Friend Shared Event MessageSending As MessageSendingHandler

        Private Sub New()
        End Sub

        Public Shared Sub SendMessage(ByVal sender As Object, ByVal Message As String)
            If MessageSendingEvent Is Nothing Then Exit Sub

            RaiseEvent MessageSending(sender, Message)
        End Sub

        Public Shared Sub SendMessage(ByVal message As String)
            SendMessage(Nothing, message)
        End Sub

        Public Shared Sub ActiveFormWithMaxnumSize(ByVal form As Windows.Forms.Form)
            With form
                .Location = New Point(0, 0)
                .Size = System.Windows.Forms.SystemInformation.WorkingArea.Size
            End With
            Win32API.WindowsAction.ShowWindow(form)
        End Sub
    End Class
End Namespace
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红色是不懂的地方

Sub ??
这个事什么意思啊

void

If MessageSendingEvent Is Nothing Then Exit Sub
这句是：
if(MessageSendingEvent==null)
{
   return;
}

Win32API.WindowsAction.ShowWindow(form) 我想应该是调用API的
C#：
DllImport("user32.dll", EntryPoint = "ShowWindow", CharSet = CharSet.Auto)]
public static extern int ShowWindow(IntPtr hwnd, int nCmdShow);

“MessageSendingEvent”这个上下文不存在么

using System; 
using System.Collections.Generic; 
using System.Text; 
using System.Drawing; 
using System.Windows.Forms; 
 
namespace LzmTW.uSystem.uWindows.uForms.uMainForm 
{ 
    public delegate void MessageSendingHandler(object obj,String str); 
 
    public partial class SplashScreenHelper 
    { 
        public MessageSendingHandler MessageSending; 
 
        public SplashScreenHelper() 
        { 
 
        } 
 
        public void SendMessage(object obj,string str) 
        { 
            if(MessageSendingHandler==null) 
            { 
                return; 
            } 
            MessageSending(obj,str); 
        } 
 
        public void SendMessage(string str) 
        { 
            MessageSending(obj,str); 
        } 
 
        public void ActiveFormWithMaxnumSize(Form fr) 
        { 
            fr.Location=new Point(0,0); 
            fr.Size=System.Windows.Forms.SystemInformation.WorkingArea.Size; 
            Win32API.WindowsAction.ShowWindow(fr); 
        } 
    } 
}