윈도우즈 API 정복 4-2장 예제 소스코드

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API와 운영체제를 통해 알고리즘과 논리력을 키울 수 있도록 쓰여진 책입니다. 초급 프로그래머는 그래픽 환경에 쉽게 적응하여 탄탄한 기본기를 다질 수 있으며 중급 프로그래머는 운영체제의 내부 구조와 동작을 이해함으로써 진정한 응용력을 키울 수 있다.

#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
LPCTSTR lpszClass=TEXT("MyTimer");

int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance
		  ,LPSTR lpszCmdParam,int nCmdShow)
{
	HWND hWnd;
	MSG Message;
	WNDCLASS WndClass;
	g_hInst=hInstance;
	
	WndClass.cbClsExtra=0;
	WndClass.cbWndExtra=0;
	WndClass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
	WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
	WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
	WndClass.hInstance=hInstance;
	WndClass.lpfnWndProc=WndProc;
	WndClass.lpszClassName=lpszClass;
	WndClass.lpszMenuName=NULL;
	WndClass.style=CS_HREDRAW | CS_VREDRAW;
	RegisterClass(&WndClass);

	hWnd=CreateWindow(lpszClass,lpszClass,WS_OVERLAPPEDWINDOW,
		  CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
		  NULL,(HMENU)NULL,hInstance,NULL);
	ShowWindow(hWnd,nCmdShow);
	
	while (GetMessage(&Message,NULL,0,0)) {
		TranslateMessage(&Message);
		DispatchMessage(&Message);
	}
	return (int)Message.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
	HDC hdc;
	PAINTSTRUCT ps;
	SYSTEMTIME st;
	static TCHAR sTime[128];
	static RECT rt={100,100,400,120};

	switch (iMessage) {
	case WM_CREATE:
		SetTimer(hWnd,1,1000,NULL);
//		SendMessage(hWnd, WM_TIMER, 1, 0);
		return 0;
	case WM_TIMER:
		GetLocalTime(&st);
		wsprintf(sTime,TEXT("지금 시간은 %d:%d:%d입니다"),
			st.wHour,st.wMinute,st.wSecond);
		InvalidateRect(hWnd,NULL,TRUE);
//		InvalidateRect(hWnd,&rt,TRUE);
		return 0;
	case WM_PAINT:
		hdc=BeginPaint(hWnd,&ps);
		TextOut(hdc,100,100,sTime,lstrlen(sTime));
		EndPaint(hWnd,&ps);
		return 0;
	case WM_DESTROY:
		KillTimer(hWnd,1);
		PostQuitMessage(0);
		return 0;
	}
	return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}

#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
HWND hWndMain;
LPCTSTR lpszClass=TEXT("OnceTimer");

int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance
	  ,LPSTR lpszCmdParam,int nCmdShow)
{
	HWND hWnd;
	MSG Message;
	WNDCLASS WndClass;
	g_hInst=hInstance;

	WndClass.cbClsExtra=0;
	WndClass.cbWndExtra=0;
	WndClass.hbrBackground=(HBRUSH)(COLOR_WINDOW+1);
	WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
	WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
	WndClass.hInstance=hInstance;
	WndClass.lpfnWndProc=WndProc;
	WndClass.lpszClassName=lpszClass;
	WndClass.lpszMenuName=NULL;
	WndClass.style=CS_HREDRAW | CS_VREDRAW;
	RegisterClass(&WndClass);

	hWnd=CreateWindow(lpszClass,lpszClass,WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
		NULL,(HMENU)NULL,hInstance,NULL);
	ShowWindow(hWnd,nCmdShow);

	while (GetMessage(&Message,NULL,0,0)) {
		TranslateMessage(&Message);
		DispatchMessage(&Message);
	}
	return (int)Message.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
	HDC hdc;
	PAINTSTRUCT ps;
	static TCHAR str[128];

	switch (iMessage) {
/* 틀린 코드
	case WM_LBUTTONDOWN:
		hdc=GetDC(hWnd);
		lstrcpy(str,"왼쪽 버튼을 눌렀습니다.");
		TextOut(hdc,10,10,str,lstrlen(str));
		GdiFlush();
		Sleep(3000);
		lstrcpy(str,"");
		InvalidateRect(hWnd,NULL,TRUE);
		ReleaseDC(hWnd,hdc);
		return 0;
//*/
//*
	case WM_LBUTTONDOWN:
		lstrcpy(str,"왼쪽 버튼을 눌렀습니다.");
		InvalidateRect(hWnd,NULL,TRUE);
		SetTimer(hWnd,1,3000,NULL);
		return 0;
//*/
	case WM_TIMER:
		KillTimer(hWnd,1);
		lstrcpy(str,"");
		InvalidateRect(hWnd,NULL,TRUE);
		return 0;
	case WM_PAINT:
		hdc=BeginPaint(hWnd, &ps);
		TextOut(hdc,10,10,str,lstrlen(str));
		EndPaint(hWnd, &ps);
		return 0;
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	}
	return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}

#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
LPCTSTR lpszClass=TEXT("RandGrp");

int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance
		  ,LPSTR lpszCmdParam,int nCmdShow)
{
	HWND hWnd;
	MSG Message;
	WNDCLASS WndClass;
	g_hInst=hInstance;
	
	WndClass.cbClsExtra=0;
	WndClass.cbWndExtra=0;
	WndClass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
	WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
	WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
	WndClass.hInstance=hInstance;
	WndClass.lpfnWndProc=WndProc;
	WndClass.lpszClassName=lpszClass;
	WndClass.lpszMenuName=NULL;
	WndClass.style=CS_HREDRAW | CS_VREDRAW;
	RegisterClass(&WndClass);

	hWnd=CreateWindow(lpszClass,lpszClass,WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
		NULL,(HMENU)NULL,hInstance,NULL);
	ShowWindow(hWnd,nCmdShow);
	
	while (GetMessage(&Message,NULL,0,0)) {
		TranslateMessage(&Message);
		DispatchMessage(&Message);
	}
	return (int)Message.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
	HDC hdc;
	PAINTSTRUCT ps;
	int i;

	switch (iMessage) {
	case WM_CREATE:
		SetTimer(hWnd,1,50,NULL);
		return 0;
	case WM_TIMER:
		hdc=GetDC(hWnd);
		for (i=0;i<1000;i++) {
			SetPixel(hdc,rand()%500, rand()%400,
				RGB(rand()%256,rand()%256,rand()%256));
		}
		ReleaseDC(hWnd, hdc);
		return 0;
	case WM_LBUTTONDOWN:
		hdc=GetDC(hWnd);
		Ellipse(hdc,LOWORD(lParam)-10,HIWORD(lParam)-10,
			LOWORD(lParam)+10,HIWORD(lParam)+10);
		ReleaseDC(hWnd, hdc);
		return 0;
/* 이렇게 무한 루프를 돌면 안된다.	
	case WM_PAINT:
		hdc=BeginPaint(hWnd, &ps);
		for (;;) {
			SetPixel(hdc,rand()%500, rand()%400,
				RGB(rand()%256,rand()%256,rand()%256));
		}
		EndPaint(hWnd, &ps);
		return 0;
//*/
	case WM_DESTROY:
		KillTimer(hWnd, 1);
		PostQuitMessage(0);
		return 0;
	}
	return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}

#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
LPCTSTR lpszClass=TEXT("TwoTimer");

int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance
		  ,LPSTR lpszCmdParam,int nCmdShow)
{
	HWND hWnd;
	MSG Message;
	WNDCLASS WndClass;
	g_hInst=hInstance;
	
	WndClass.cbClsExtra=0;
	WndClass.cbWndExtra=0;
	WndClass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
	WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
	WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
	WndClass.hInstance=hInstance;
	WndClass.lpfnWndProc=WndProc;
	WndClass.lpszClassName=lpszClass;
	WndClass.lpszMenuName=NULL;
	WndClass.style=CS_HREDRAW | CS_VREDRAW;
	RegisterClass(&WndClass);

	hWnd=CreateWindow(lpszClass,lpszClass,WS_OVERLAPPEDWINDOW,
		  CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
		  NULL,(HMENU)NULL,hInstance,NULL);
	ShowWindow(hWnd,nCmdShow);
	
	while (GetMessage(&Message,NULL,0,0)) {
		TranslateMessage(&Message);
		DispatchMessage(&Message);
	}
	return (int)Message.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
	HDC hdc;
	PAINTSTRUCT ps;
	SYSTEMTIME st;
	static TCHAR sTime[128];
	static RECT rt={100,100,400,120};

	switch (iMessage) {
	case WM_CREATE:
		SetTimer(hWnd,1,1000,NULL);
		SetTimer(hWnd,2,5000,NULL);
		SendMessage(hWnd, WM_TIMER, 1, 0);
		return 0;
	case WM_TIMER:
		switch (wParam) {
		case 1:
			GetLocalTime(&st);
			wsprintf(sTime,TEXT("지금 시간은 %d:%d:%d입니다"),
				st.wHour,st.wMinute,st.wSecond);
			InvalidateRect(hWnd,&rt,TRUE);
			break;
		case 2:
			MessageBeep(0);
			break;
		}
		return 0;
	case WM_PAINT:
		hdc=BeginPaint(hWnd,&ps);
		TextOut(hdc,100,100,sTime,lstrlen(sTime));
		EndPaint(hWnd,&ps);
		return 0;
	case WM_DESTROY:
		KillTimer(hWnd,1);
		KillTimer(hWnd,2);
		PostQuitMessage(0);
		return 0;
	}
	return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}

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