第四回-付録01 : Windows プログラミング

#define _WIN32_WINNT 0x400
#define WINVER 0x400
#include <windows>
using namespace std;

long WINAPI WndProc(HWND hwnd,UINT msg,UINT wParam,LONG lParam)
{
    PAINTSTRUCT ps;

	switch(msg){
		case WM_CREATE: break;
		case WM_DESTROY: PostQuitMessage(0); break;
		case WM_SIZE: break;
		case WM_PAINT: BeginPaint(hwnd,&ps);
			TextOut(ps.hdc,0,0,"Hello World!",12);
			EndPaint(hwnd,&ps);
			break;
		default: 
			return DefWindowProc(hwnd,msg,wParam,lParam);
	}
	return(0);
}

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance, LPSTR, int nCmdShow)
{
	HWND hwnd;
	MSG msg;
	WNDCLASS wc;	/*window型のアプリを作る．*/
	if(!hPrevInstance){
		wc.style   = CS_HREDRAW|CS_VREDRAW;	/* Windowスタイル */
		wc.lpfnWndProc   = WndProc;	/* イベントハンドラの定義 */
		wc.cbClsExtra       = 0;
		wc.cbWndExtra       = 0;
		wc.hInstance   = hInstance;	/* 自分のインスタンスをセット */
		wc.hIcon         = NULL;	/* ICONは使わないのでNULL */
		wc.hCursor     = LoadCursor(NULL,IDC_ARROW); 
		wc.hbrBackground    = 
			(HBRUSH)GetStockObject(WHITE_BRUSH);
		wc.lpszMenuName     = NULL;
		wc.lpszClassName    = "HelloWorld" ;
		RegisterClass(&wc) ;	/*　winOsに通知・登録する．*/
	}
	hwnd=CreateWindow(
		"HelloWorld",
		"Test Program Windows sample 001",
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		400+GetSystemMetrics(SM_CXBORDER)*2,
		200+GetSystemMetrics(SM_CYCAPTION)
		+GetSystemMetrics(SM_CYMENU)
		+GetSystemMetrics(SM_CYBORDER) * 2,
		NULL,
		NULL,
		hInstance,
		NULL);	/*このhInstanceのポインターをhwndに渡す*/

	ShowWindow(hwnd,nCmdShow);
	UpdateWindow(hwnd);
	while(GetMessage(&msg,NULL,0,0)){	/*msgループ*/
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}