A simple Win32 program written in C # Language

The classic demo program that I first came into contact with when I was learning C/C ++/Windows programming. Today I used C # to play with it.

In fact, using C # To compile a small Wrapper class library for Win32 windows and controls is also indispensable.

The VCL of Delphi can be used as a reference.

Code memo:

Using system; using system. runtime. interopservices;/*** zyg-Dobzhansky 2009-8-19 20:58 */namespace demo {class program {static void main () {// initialize the window class structure wndclass WC = new wndclass (); WC. style = 0; WC. lpfnwndproc = splashwindowprocedure; WC. hinstance = getmodulehandle (null); WC. hbrbackground = (intptr) 6; WC. lpszclassname = "csharpwindow"; WC. cbclsextra = 0; WC. cbwndextra = 0; WC. hicon = intptr. zero; WC. hcursor = intptr. zero; WC. lpszmenuname = NULL; // register the window class registerclass (WC); // create and display the window intptr hwnd; hwnd = createjavaswex (0, "csharpwindow", "Welcome ", (INT) ws_style.ws_overlappedwindow,-1,-1,400,300, intptr. zero, intptr. zero, getmodulehandle (null), null); showwindow (hwnd, 1); updatewindow (hwnd); // enter the message loop MSG = new MSG (); while (getmessage (ref MSG, intptr. zero, 0, 0) {translatemessage (ref MSG); dispatchmessage (ref MSG) ;}// static int splashwindowprocedure (intptr hwnd, int MSG, intptr wparam, intptr lparam) {Switch (MSG) {Case wm_destroy: postquitmessage (0); break;} return defwindowproc (hwnd, MSG, wparam, lparam);} [flags] public Enum ws_style: long {partition = 0x00000000l, ws_caption = partition,/* ws_border | ws_dlgframe */partition = 0x00080000l, ws_thickframe = 0x00040000l, ws_minimizebox = 0x00020000l, partition = 0x0000000l, partition = (partition | ws_caption | partition | ws_thickframe | ws_minimizebox | partition),} public const int wm_destroy = 2; Public const int wm_close = 0x10; [dllimport ("user32.dll ", charset = charset. auto)] public static extern int postmessage (intptr hwnd, int MSG, intptr wparam, intptr lparam); [dllimport ("kernel32.dll", charset = charset. auto)] public static extern intptr getmodulehandle (string modulename); [dllimport ("user32.dll", charset = charset. auto)] public static extern intptr registerclass (wndclass WC); [dllimport ("user32.dll", charset = charset. auto)] public static extern intptr createcontactwex (INT dwexstyle, string lpszclassname, string lpszwindowname, int style, int X, int y, int width, int height, intptr hwndparent, intptr hmenu, intptr hinst, [financialas (unmanagedtype. asany)] object pvparam); [dllimport ("user32.dll", charset = charset. auto)] public static extern bool showwindow (intptr hwnd, int ncmdshow); [dllimport ("user32.dll", charset = charset. auto)] public static extern bool updatewindow (intptr hwnd); [dllimport ("user32.dll", charset = charset. auto)] public static extern bool getmessage (ref MSG, intptr hwnd, int minfilter, int maxfilter); [dllimport ("user32.dll", charset = charset. auto)] public static extern bool translatemessage (ref MSG); [dllimport ("user32.dll", charset = charset. auto)] public static extern int dispatchmessage (ref MSG); [dllimport ("user32.dll", charset = charset. auto)] public static extern void postquitmessage (INT nexitcode); [dllimport ("user32.dll", charset = charset. auto)] public static extern int defwindowproc (intptr hwnd, int MSG, intptr wparam, intptr lparam); [structlayout (layoutkind. sequential, charset = charset. auto)] public class wndclass {public int style = 0; Public wndproc lpfnwndproc = NULL; Public int cbclsextra = 0; Public int cbwndextra = 0; Public intptr hinstance = intptr. zero; Public intptr hicon = intptr. zero; Public intptr hcursor = intptr. zero; Public intptr hbrbackground = intptr. zero; Public String lpszmenuname = NULL; Public String lpszclassname = NULL;} [structlayout (layoutkind. sequential)] public struct MSG {public intptr hwnd; Public int message; Public intptr wparam; Public intptr lparam; Public int time; Public int pt_x; Public int pt_y ;} public Delegate int wndproc (intptr hwnd, int MSG, intptr wparam, intptr lparam );}}