Windows编程2-打印参数

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#include <windows.h>

#include "SYSTEM.h"

/*****************************************************

Windows SDK编程之一窗口示例程序

******************************************************/

/*Win32应用程序框架主要由"初始化窗口类"，"窗口注册类"，"窗口的创建"以"窗口消息函数"等组成*/

LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam);

WinMain函数是所有windows应用程序的入口，类似于C语言中的Main函数，其功能是完成一系列的定义和初始化工作，并产生消息循环。消息循环是整个程序运行的核心。WinMain函数实现以下功能。

1. 注册窗口类，建立窗口及执行其它必要的初始化工作；

2. 进入消息循环，根据从应用程序消息队列接受的消息，调用相应的处理过程

3. 当消息循环检索到WM_QUIT消息时终止程序运行。

WinMain函数有三个基本的组成部份：函数说明、初始化和消息循环。

int APIENTRY WinMain( //WinMain函数说明

HINSTANCE hInstance, //程序当前实例句柄

HINSTANCE hPrevInstance, //应用程序其它实例句柄

LPSTR lpCmdLine, //指向程序命令行参数的指针

int iCmdShow) //应用程序开始执行时窗口显示方式的整数值标识

{

由于Window操作系统是多任务的操作系统，能进行多任务的管理，因此，windows应用程序可能被并行的多次执行，因而可能出现同一个程序的多个窗口同时存在的情况，Windows系统将应用程序每一次执行称为该应用程序的一个实例（Instance），并用一个实例句柄唯一的标识它。

static TCHAR szAppName[] = TEXT ("SysMets1") ;

HWND hwnd ; //句柄

MSG msg ;

WNDCLASS wndclass;

wndclass.style = CS_HREDRAW | CS_VREDRAW ;

wndclass.lpfnWndProc = WndProc ;

wndclass.cbClsExtra = 0 ;

wndclass.cbWndExtra = 0 ;

wndclass.hInstance = hInstance ;

wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;

wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;

wndclass.hbrBackground= (HBRUSH) GetStockObject (WHITE_BRUSH) ;

wndclass.lpszMenuName = NULL ;

wndclass.lpszClassName= szAppName ;

if (!RegisterClass(&wndclass))

{

MessageBox ( NULL, TEXT ("This program requires Windows NT!"),

szAppName, MB_ICONERROR) ;

return 0 ;

}

hwnd = CreateWindow( szAppName, // window class name

TEXT ("The Hello Program"), // window caption

WS_OVERLAPPEDWINDOW, // window style

CW_USEDEFAULT,// initial x position

CW_USEDEFAULT,// initial y position

CW_USEDEFAULT,// initial x size

CW_USEDEFAULT,// initial y size

NULL, // parent window handle

NULL, // window menu handle

hInstance, // program instance handle

NULL) ; // creation parameters

ShowWindow(hwnd, iCmdShow) ;

UpdateWindow (hwnd) ;

while (GetMessage(&msg, NULL, 0, 0))

{

TranslateMessage (&msg) ; //翻译消息

DispatchMessage (&msg) ; //分发消息

}

return msg.wParam ;

}

LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)

{

static int cxChar, cxCaps, cyChar ;

HDC hdc ;

int i ;

PAINTSTRUCT ps ;

TCHAR szBuffer [10] ;

TEXTMETRIC tm ;

switch (message)

{

case WM_CREATE:

hdc = GetDC (hwnd) ;

GetTextMetrics (hdc, &tm) ;

cxChar = tm.tmAveCharWidth ;

cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2 ;

cyChar = tm.tmHeight + tm.tmExternalLeading ;

ReleaseDC (hwnd, hdc) ;

return 0 ;

case WM_PAINT :

hdc = BeginPaint (hwnd, &ps) ;

for (i = 0 ; i < NUMLINES ; i++)

{

TextOut (hdc, 0, cyChar * i,

sysmetrics[i].szLabel,

lstrlen (sysmetrics[i].szLabel)) ;

TextOut (hdc, 22 * cxCaps, cyChar * i,

sysmetrics[i].szDesc,

lstrlen (sysmetrics[i].szDesc)) ;

SetTextAlign (hdc, TA_RIGHT | TA_TOP) ;

TextOut (hdc, 22 * cxCaps + 40 * cxChar, cyChar * i, szBuffer,

wsprintf (szBuffer, TEXT ("%5d"),

GetSystemMetrics (sysmetrics[i].Index))) ;

SetTextAlign (hdc, TA_LEFT | TA_TOP) ;

}

EndPaint (hwnd, &ps) ;

return 0 ;

case WM_DESTROY :

PostQuitMessage (0) ;

return 0 ;

}

return ::DefWindowProc(hwnd,message,wParam,lParam);

}

/*---------------------------------------------------------

SYSMETS.H -- System metrics display structure

-----------------------------------------------------------*/

#define NUMLINES ((int) (sizeof sysmetrics / sizeof sysmetrics [0]))

struct

{

int Index ;

TCHAR * szLabel ;

TCHAR * szDesc ;

}

sysmetrics [] =

{

SM_CXSCREEN, TEXT ("SM_CXSCREEN"),

TEXT ("Screen width in pixels"),

SM_CYSCREEN, TEXT ("SM_CYSCREEN"),

TEXT ("Screen height in pixels"),

SM_CXVSCROLL, TEXT ("SM_CXVSCROLL"),

TEXT ("Vertical scroll width"),

SM_CYHSCROLL, TEXT ("SM_CYHSCROLL"),

TEXT ("Horizontal scroll height"),

SM_CYCAPTION, TEXT ("SM_CYCAPTION"),

TEXT ("Caption bar height"),

SM_CXBORDER, TEXT ("SM_CXBORDER"),

TEXT ("Window border width"),

SM_CYBORDER, TEXT ("SM_CYBORDER"),

TEXT ("Window border height"),

SM_CXFIXEDFRAME,TEXT ("SM_CXFIXEDFRAME"),

TEXT ("Dialog window frame width"),

SM_CYFIXEDFRAME,TEXT ("SM_CYFIXEDFRAME"),

TEXT ("Dialog window frame height"),

SM_CYVTHUMB, TEXT ("SM_CYVTHUMB"),

TEXT ("Vertical scroll thumb height"),

SM_CXHTHUMB, TEXT ("SM_CXHTHUMB"),

TEXT ("Horizontal scroll thumb width"),

SM_CXICON, TEXT ("SM_CXICON"),

TEXT ("Icon width"),

SM_CYICON, TEXT ("SM_CYICON"),

TEXT ("Icon height"),

SM_CXCURSOR, TEXT ("SM_CXCURSOR"),

TEXT ("Cursor width"),

SM_CYCURSOR, TEXT ("SM_CYCURSOR"),

TEXT ("Cursor height"),

SM_CYMENU, TEXT ("SM_CYMENU"),

TEXT ("Menu bar height"),

SM_CXFULLSCREEN,TEXT ("SM_CXFULLSCREEN"),

TEXT ("Full screen client area width"),

SM_CYFULLSCREEN,TEXT ("SM_CYFULLSCREEN"),

TEXT ("Full screen client area height"),

SM_CYKANJIWINDOW,TEXT ("SM_CYKANJIWINDOW"),

TEXT ("Kanji window height"),

SM_MOUSEPRESENT, TEXT ("SM_MOUSEPRESENT"),

TEXT ("Mouse present flag"),

SM_CYVSCROLL,TEXT ("SM_CYVSCROLL"),

TEXT ("Vertical scroll arrow height"),

SM_CXHSCROLL,TEXT ("SM_CXHSCROLL"),

TEXT ("Horizontal scroll arrow width"),

SM_DEBUG, TEXT ("SM_DEBUG"),

TEXT ("Debug version flag"),

SM_SWAPBUTTON,TEXT ("SM_SWAPBUTTON"),

TEXT ("Mouse buttons swapped flag"),

SM_CXMIN, TEXT ("SM_CXMIN"),

TEXT ("Minimum window width"),

SM_CYMIN, TEXT ("SM_CYMIN"),

TEXT ("Minimum window height"),

SM_CXSIZE, TEXT ("SM_CXSIZE"),

TEXT ("Min/Max/Close button width"),

SM_CYSIZE, TEXT ("SM_CYSIZE"),

TEXT ("Min/Max/Close button height"),

SM_CXSIZEFRAME,TEXT ("SM_CXSIZEFRAME"),

TEXT ("Window sizing frame width"),

SM_CYSIZEFRAME,TEXT ("SM_CYSIZEFRAME"),

TEXT ("Window sizing frame height"),

SM_CXMINTRACK,TEXT ("SM_CXMINTRACK"),

TEXT ("Minimum window tracking width"),

SM_CYMINTRACK,TEXT ("SM_CYMINTRACK"),

TEXT ("Minimum window tracking height"),

SM_CXDOUBLECLK,TEXT ("SM_CXDOUBLECLK"),

TEXT ("Double click x tolerance"),

SM_CYDOUBLECLK,TEXT ("SM_CYDOUBLECLK"),

TEXT ("Double click y tolerance"),

SM_CXICONSPACING,TEXT ("SM_CXICONSPACING"),

TEXT ("Horizontal icon spacing"),

SM_CYICONSPACING,TEXT ("SM_CYICONSPACING"),

TEXT ("Vertical icon spacing"),

SM_MENUDROPALIGNMENT,TEXT ("SM_MENUDROPALIGNMENT"),

TEXT ("Left or right menu drop"),

SM_PENWINDOWS, TEXT ("SM_PENWINDOWS"),

TEXT ("Pen extensions installed"),

SM_DBCSENABLED, TEXT ("SM_DBCSENABLED"),

TEXT ("Double-Byte Char Set enabled"),

SM_CMOUSEBUTTONS, TEXT ("SM_CMOUSEBUTTONS"),

TEXT ("Number of mouse buttons"),

SM_SECURE, TEXT ("SM_SECURE"),

TEXT ("Security present flag"),

SM_CXEDGE, TEXT ("SM_CXEDGE"),

TEXT ("3-D border width"),

SM_CYEDGE, TEXT ("SM_CYEDGE"),

TEXT ("3-D border height"),

SM_CXMINSPACING, TEXT ("SM_CXMINSPACING"),

TEXT ("Minimized window spacing width"),

SM_CYMINSPACING, TEXT ("SM_CYMINSPACING"),

TEXT ("Minimized window spacing height"),

SM_CXSMICON, TEXT ("SM_CXSMICON"),

TEXT ("Small icon width"),

SM_CYSMICON, TEXT ("SM_CYSMICON"),

TEXT ("Small icon height"),

SM_CYSMCAPTION, TEXT ("SM_CYSMCAPTION"),

TEXT ("Small caption height"),

SM_CXSMSIZE, TEXT ("SM_CXSMSIZE"),

TEXT ("Small caption button width"),

SM_CYSMSIZE, TEXT ("SM_CYSMSIZE"),

TEXT ("Small caption button height"),

SM_CXMENUSIZE, TEXT ("SM_CXMENUSIZE"),

TEXT ("Menu bar button width"),

SM_CYMENUSIZE, TEXT ("SM_CYMENUSIZE"),

TEXT ("Menu bar button height"),

SM_ARRANGE, TEXT ("SM_ARRANGE"),

TEXT ("How minimized windows arranged"),

SM_CXMINIMIZED, TEXT ("SM_CXMINIMIZED"),

TEXT ("Minimized window width"),

SM_CYMINIMIZED, TEXT ("SM_CYMINIMIZED"),

TEXT ("Minimized window height"),

SM_CXMAXTRACK, TEXT ("SM_CXMAXTRACK"),

TEXT ("Maximum draggable width"),

SM_CYMAXTRACK, TEXT ("SM_CYMAXTRACK"),

TEXT ("Maximum draggable height"),

SM_CXMAXIMIZED, TEXT ("SM_CXMAXIMIZED"),

TEXT ("Width of maximized window"),

SM_CYMAXIMIZED, TEXT ("SM_CYMAXIMIZED"),

TEXT ("Height of maximized window"),

SM_NETWORK, TEXT ("SM_NETWORK"),

TEXT ("Network present flag"),

SM_CLEANBOOT, TEXT ("SM_CLEANBOOT"),

TEXT ("How system was booted"),

SM_CXDRAG, TEXT ("SM_CXDRAG"),

TEXT ("Avoid drag x tolerance"),

SM_CYDRAG, TEXT ("SM_CYDRAG"),

TEXT ("Avoid drag y tolerance"),

SM_SHOWSOUNDS, TEXT ("SM_SHOWSOUNDS"),

TEXT ("Present sounds visually"),

SM_CXMENUCHECK, TEXT ("SM_CXMENUCHECK"),

TEXT ("Menu check-mark width"),

SM_CYMENUCHECK, TEXT ("SM_CYMENUCHECK"),

TEXT ("Menu check-mark height"),

SM_SLOWMACHINE, TEXT ("SM_SLOWMACHINE"),

TEXT ("Slow processor flag"),

SM_MIDEASTENABLED, TEXT ("SM_MIDEASTENABLED"),

TEXT ("Hebrew and Arabic enabled flag"),

SM_MOUSEWHEELPRESENT,TEXT ("SM_MOUSEWHEELPRESENT"),

TEXT ("Mouse wheel present flag"),

SM_XVIRTUALSCREEN, TEXT ("SM_XVIRTUALSCREEN"),

TEXT ("Virtual screen x origin"),

SM_YVIRTUALSCREEN, TEXT ("SM_YVIRTUALSCREEN"),

TEXT ("Virtual screen y origin"),

SM_CXVIRTUALSCREEN, TEXT ("SM_CXVIRTUALSCREEN"),

TEXT ("Virtual screen width"),

SM_CYVIRTUALSCREEN, TEXT ("SM_CYVIRTUALSCREEN"),

TEXT ("Virtual screen height"),

SM_CMONITORS, TEXT ("SM_CMONITORS"),

TEXT ("Number of monitors"),

SM_SAMEDISPLAYFORMAT,TEXT ("SM_SAMEDISPLAYFORMAT"),

TEXT ("Same color format flag")

} ;