无聊的时候在.Net下用API写了一个Window窗户.
简单比较了一下,纯API的窗体运行启动要快点,起始占用内存也少点,大概6M,但比起用asm创建的一般才2M多点还是看得出.Net确实是吃内存的大户啊.^_^

代码

/*    Snippet Compiler
*    Author : Phoenix Chen    
*    Date   : 2006-02-10
*    Comment:
*/
using System;
using System.Runtime.InteropServices;

namespace CzG
{
    public class MyClass
    {
        static IntPtr hInstance;
        static IntPtr hWinMain;
        static string strAppName;
        static string strClassName;
        
        public static void Main()
        {
            WinMain();
        }
        
        // Initialize Window
        public static void WinMain()
        {
            strAppName         = "API Window";
            strClassName     = "MyClass";
            
            // Get Application Module Handle
            // API : GetModuleHandle
            hInstance = Marshal.GetHINSTANCE(typeof(MyClass).Assembly.GetModules()[0]);
            
            WinAPI.WNDCLASSEX wndClass = new WinAPI.WNDCLASSEX();
            wndClass.cbSize = Marshal.SizeOf(wndClass);
            wndClass.style = 3;//CS_HREDRAW | CS_VREDRAW;
            wndClass.lpfnWndProc = new WindowProc(WndProc); // using Marshal.GetFunctionPointerForDelegate to get a delegate's handle in .Net Framework 2.0
            wndClass.hInstance = hInstance;
            wndClass.hIcon = WinAPI.LoadIcon(IntPtr.Zero,32512); // IDI_APPLICATION , MAKEINTRESOURCE macro in C++ converts a WORD to DWORD
            wndClass.hCursor = WinAPI.LoadCursor(IntPtr.Zero,32512); // IDC_ARROW
            wndClass.hbrBackground = 6; //COLOR_WINDOWFRAME 
            wndClass.lpszClassName = strClassName;
            
            if(WinAPI.RegisterClassEx(ref wndClass) == 0)
            {
                return;
            }
            
            // Create & Display Window
            //                                 WS_EX_CLIENTEDGE              WS_DLGFRAME
            hWinMain = WinAPI.CreateWindowEx(0x200,strClassName,strAppName,WS_OVERLAPPEDWINDOW ,100,100,400,300,0,0,hInstance,0);
            
            WinAPI.ShowWindow(hWinMain,1); //SW_SHOWNORMAL
            WinAPI.UpdateWindow(hWinMain);
            
            // Message loop
            WinAPI.MSG msg = new WinAPI.MSG();
            while(true)
            {
                if(!WinAPI.GetMessage(ref msg,0,0,0))
                {
                    break;
                }
                
                WinAPI.TranslateMessage(ref msg);
                WinAPI.DispatchMessage(ref msg);
            }
        }
        
        // Window Procedure
        public static int WndProc(IntPtr hWnd,uint uMsg,int wParam,int lParam)
        {
            switch(uMsg)
            {
                case 0x10: // WM_CLOSE
                    WinAPI.DestroyWindow(hWinMain);
                    WinAPI.PostQuitMessage(0);
                    break;
                default:
                    return WinAPI.DefWindowProc(hWnd,uMsg,wParam,lParam);
            }
            return 0;
        }
    public const int WS_OVERLAPPEDWINDOW = (WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX);    
    public const int WS_MAXIMIZEBOX = 0x10000;
    public const int WS_MINIMIZEBOX = 0x20000;
    public const int WS_SYSMENU = 0x80000;
    public const int WS_OVERLAPPED = 0x0;
    public const int WS_THICKFRAME = 0x40000;
    public const int WS_CAPTION = 0xC00000;

    }
    
    public delegate int WindowProc(IntPtr hWnd,uint uMsg,int wParam,int lParam);

    public class WinAPI
    {
        Structures
        
        WINAPIs 
    }
}

.Net下的代码

/*    Snippet Compiler
*    Author : Phoenix Chen    
*    Date   :
*    Comment:
*/
using System;
using System.Windows.Forms;

namespace CzG
{
    public class MyClass : Form
    {
        public MyClass()
        {
            this.Text = ".Net Window";
        }
        public static void Main()
        {
            Application.Run(new MyClass());
        }
    }
}