用Window API编写的定时器程序

#define    _WIN32_IE        0x0600
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
#include <time.h>
 
#define ID_TIMER		1
#define ID_APPLY		2002
#define ID_HIDE			2003
#define ID_ICON			2005
 
HWND        hwnd;
HWND        hwnd_apply;
HWND        hwnd_min;
HWND		hwnd_rest;
HWND		hwnd_current;
HWND		hwnd_tips;
 
NOTIFYICONDATA    nd;
 
int RestTime = 0;
 
char szAppName[] = "PSCountdown";
 
void ShowNotify(void)
{
    nd.uFlags |= NIF_INFO;
    strcpy(nd.szInfoTitle, "PSCountdown");
    strcpy(nd.szInfo, "Setting Time Count Down!!!");
    Shell_NotifyIcon(NIM_MODIFY, &nd);
}
 
void CALLBACK TimerProc(HWND hwnd, UINT uMsg, UINT idEvent, DWORD dwTime)
{
	char m_str[30] = {0};
	SYSTEMTIME SysTime;
 
	if (RestTime > 0) {
		RestTime--;
		sprintf(m_str, "Rest Seconds: %d", RestTime);
		SetWindowText(hwnd_rest, m_str);
		if(RestTime <= 0)ShowNotify();
	}
 
	GetLocalTime(&SysTime);
	sprintf(m_str, "Current Time: %02d:%02d:%02d", SysTime.wHour, SysTime.wMinute, SysTime.wSecond);
	SetWindowText(hwnd_current, m_str);
	return;
}
 
void SetRestTime(void)
{
	int setime = 0;
	char m_time[3] = {0};
	GetWindowText(hwnd_min, m_time, 3);
	setime = atoi(m_time);
 
	if(setime>60 || setime<=0)
		MessageBox(hwnd, "Setting Time must be 1~60 min!", "Warning", 0);
	else
		RestTime = setime * 60;
}
 
void QuitWin(void)
{
	Shell_NotifyIcon(NIM_DELETE, &nd);
	PostQuitMessage(0);
}
 
void IconNotifyProc(LPARAM lParam)
{
	switch(lParam) {
	case WM_LBUTTONDOWN:
	case WM_RBUTTONDOWN:
		ShowWindow(hwnd, SW_NORMAL);
		break;
 
	case 0x404:
	case 0x405:
		QuitWin();
		break;
 
	default:
		break;
	}
}
 
LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam) 
{
    switch (iMsg) {
	case WM_COMMAND:
		switch(wParam) {
		case ID_APPLY:
			SetRestTime();
			ShowWindow(hwnd, SW_HIDE);
			break;
		case ID_ICON:
			IconNotifyProc(lParam);
			break;
		default:
			break;
		}
		break;
	case WM_SYSCOMMAND:
		if(wParam == SC_MINIMIZE) {
			ShowWindow(hwnd, SW_HIDE);
			return 0;
		}
		break;
    case WM_DESTROY:
		QuitWin();
        return 0;
    }
 
    return DefWindowProc(hwnd, iMsg, wParam, lParam);
}
 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
           LPSTR szCmdLine, int iCmdShow)
{
    MSG         msg;
    WNDCLASSEX  wc;
	DWORD		style;
 
    wc.cbSize         = sizeof(wc);
    wc.style          = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc    = WndProc;
    wc.cbClsExtra     = 0;
    wc.cbWndExtra     = 0;
    wc.hInstance      = hInstance;
    wc.hIcon          = LoadIcon(NULL, IDI_INFORMATION);
    wc.hIconSm        = LoadIcon(NULL, IDI_INFORMATION);
    wc.hCursor        = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground  = (HBRUSH)COLOR_BACKGROUND;
    wc.lpszClassName  = szAppName;
    wc.lpszMenuName   = NULL;
    RegisterClassEx(&wc);
 
	style = WS_OVERLAPPEDWINDOW;
	style &= ~(WS_MAXIMIZEBOX | WS_SIZEBOX);
    hwnd =          CreateWindow(szAppName, "PSCountdown - By stars_625",
                    style,
                    CW_USEDEFAULT, CW_USEDEFAULT,
                    320, 240,
                    NULL, NULL, hInstance, NULL);
 
    hwnd_apply =    CreateWindow("BUTTON", "apply",
                    WS_VISIBLE | WS_CHILD | BS_FLAT,
                    230, 90,
                    50, 20,
                    hwnd, (HMENU)ID_APPLY, hInstance, NULL);
 
    hwnd_min =      CreateWindow("EDIT", "3",
                    WS_CHILD | WS_VISIBLE | WS_BORDER,
                    230, 40,
                    50, 20,
                    hwnd, NULL, hInstance, NULL);
 
    hwnd_rest =     CreateWindow("STATIC", "Rest Seconds:",
                    WS_CHILD | WS_VISIBLE,
                    20, 90,
                    180, 20,
                    hwnd, NULL, hInstance, NULL);
 
    hwnd_current =  CreateWindow("STATIC", "Current Time:",
                    WS_CHILD | WS_VISIBLE,
                    20, 40,
                    180, 20,
                    hwnd, NULL, hInstance, NULL);
 
    hwnd_tips =		CreateWindow("STATIC", "http://www.stars625.com/pscountdown.html",
                    WS_CHILD | WS_VISIBLE,
                    10, 150,
                    290, 20,
                    hwnd, NULL, hInstance, NULL);
 
    /*    Create tray icon  */
    nd.cbSize    		= sizeof (NOTIFYICONDATA);
    nd.hWnd    			= hwnd;
    nd.uID    			= ID_ICON;
    nd.uFlags		    = NIF_ICON | NIF_MESSAGE | NIF_TIP;
    nd.hIcon    		= LoadIcon(NULL, IDI_INFORMATION);
    nd.uCallbackMessage	= WM_COMMAND;
    strcpy(nd.szTip, "PSCountdown - A Time Count Down");
    Shell_NotifyIcon(NIM_ADD, &nd);
 
    ShowWindow(hwnd, iCmdShow);
    UpdateWindow(hwnd);
 
	SetTimer(hwnd, ID_TIMER, 1000, TimerProc);
 
    while ( GetMessage(&msg, NULL, 0, 0) ) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
 
    return msg.wParam;
}