簡單的WIN32視窗封裝

封裝視窗物件。

（注意。有些命名我是直接複製win32api的，偷懶了）

本來是想直接用虛函式來處理訊息的，但是訊息很多，寫的會很吃力，所以採用類似mfc的訊息對映，現在記憶體是很富裕的，不用擔心虛函式表會占用大量記憶體，個人建議是採用虛函式的，我這裡偷偷懶。

該類主要作用:訊息處理函式呼叫該類的靜態函式wndproc，再呼叫例項物件的windowproc，進行訊息處理，如果是已經註冊的類，需要調換為我們的訊息處理函式。（wm_create和wm_nccreate並沒有呼叫）

pwnd.h

#pragma once

// windows 標頭檔案: 
#include 
// c 執行時標頭檔案
#include 
#include 
#include 
#include 
#include 
#include 
//簡單的訊息對映
#define declare_msgmap()\
public:\
virtual msginfo* getthismsgmap();\
static msginfo* getmsgmap();\
#define add_msg(msg, funproc)\
value_type(msg, (lresult(pwnd::*)(wparam wparam, lparam lparam))&funproc)
#define implement_begin_msgmap(thisclass, parentclass)\
msginfo* thisclass::getthismsgmap()\\\
msginfo* thisclass::getmsgmap()\
)\  };\
return &info;\
}class pwnd;
typedef
struct _tagmsginfo
msginfo;
class pwnd
;

#include "pwnd.h"

#include 
pwnd::pwnd() : _hwnd(null), _pfnoldwndproc(null)
pwnd::~pwnd()
}lresult callback pwnd::wndproc(hwnd hwnd, uint nmsg, wparam wparam, lparam lparam)
return ::defwindowproc(hwnd, nmsg, wparam, lparam);
}  pwnd = (pwnd*)::getwindowlongptr(hwnd, gwl_userdata);
if (pwnd) 
return ::defwindowproc(hwnd, nmsg, wparam, lparam);
}pwnd* pwnd::fromhandle(hwnd hwnd)
long pwnd::setwindowlongptr(int nindex, long ndata)
long pwnd::getwindowlongptr(int nindex)
bool pwnd::setsubclasswindow(hwnd hwnd)
bool pwnd::iswindow()
bool pwnd::showwindow(int nshow)
bool pwnd::updatewindow()
bool pwnd::destroywindow()
bool pwnd::createwindowex(dword dwexstyle, lpctstr lpclassname, lpctstr lpwindowname,
dword dwstyle, int x, int y,
int nwidth, int nheight, hwnd hwndparent,
hmenu hmenu, hinstance hinstance)
;  cs.dwexstyle = dwexstyle;
cs.lpszclass = lpclassname;
cs.lpszname = lpwindowname;
cs.style = dwstyle;
cs.x = x;
cs.y = y;
cs.cx = nwidth;
cs.cy = nheight;
cs.hwndparent = hwndparent;
cs.hmenu = hmenu;
cs.hinstance = hinstance;
if (precreatewindow(&cs) == false)
return
false;
hwnd hwnd = ::createwindowex(cs.dwexstyle, cs.lpszclass, cs.lpszname,
cs.style, cs.x, cs.y,
cs.cx, cs.cy, cs.hwndparent,
cs.hmenu, cs.hinstance, cs.lpcreateparams);
//沒有呼叫我們的靜態函式
if (_hwnd == null) 
_hwnd = hwnd;
}  //物件例項繫結 以便 自定義的訊息處理函式能呼叫例項
setwindowlongptr(gwl_userdata, (long)this);
_pfnoldwndproc = (wndproc)getwindowlongptr(gwl_wndproc);
//不是我們所註冊的類
if (_pfnoldwndproc != pwnd::wndproc) 
return
true;
}lresult pwnd::default(uint nmsg, wparam wparam, lparam lparam)
//不是我們註冊的函式，交予舊函式預設處理
return _pfnoldwndproc(_hwnd, nmsg, wparam, lparam);
}bool pwnd::precreatewindow(lpcreatestruct lpcs)
;  wcex.cbsize = sizeof(wcex);
//判斷是否要自註冊類
if (::getclassinfoex(lpcs->hinstance, lpcs->lpszclass, &wcex) == false) 
lpcs->lpcreateparams = this; //wndproc需要
return
true;
}lresult pwnd::windowproc(uint nmsg, wparam wparam, lparam lparam)
if (pinfo->_getparentmsg == null)
break;
pinfo = pinfo->_getparentmsg();
}  return
default(nmsg, wparam, lparam);
}lresult pwnd::defaultproc(uint nmsg, wparam wparam, lparam lparam)
lresult pwnd::onnccreate(wparam wparam, lparam lparam)
lresult pwnd::oncreate(wparam wparam, lparam lparam)
lresult pwnd::onclose(wparam wparam, lparam lparam)
lresult pwnd::ondestroy(wparam wparam, lparam lparam)
lresult pwnd::onncdestroy(wparam wparam, lparam lparam)
msginfo* pwnd::getthismsgmap()
msginfo* pwnd::getmsgmap()
)  };
return &info;
}

#pragma once

#include "pwnd.h"
;

; while (getmessage(&msg, null, 0, 0))

return0;}

main函式示範：

#include "win.h"

hinstance g_hinst;                                // 當前例項
int apientry wwinmain(_in_ hinstance hinstance,
_in_opt_ hinstance hprevinstance,
_in_ lpwstr    lpcmdline,
_in_ int       ncmdshow)

class

pmainwnd : public pwnd
lresult oncommand(wparam
wparam, lparam
lparam)
};implement_begin_msgmap
(pmainwnd, pwnd)
add_msg
(wm_paint, onpaint),
add_msg
(wm_command, oncommand)
implement_end_msgmap
()

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