#include <windows.h>
LPCTSTR szAppName = TEXT("TrayHelper");
LPCTSTR szWndName = TEXT("TrayIcon");
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
NOTIFYICONDATA nid;
UINT WM_TASKBARCREATED;
// 不要修改TaskbarCreated，这是系统任务栏自定义的消息
WM_TASKBARCREATED = RegisterWindowMessage(TEXT("TaskbarCreated"));
switch (message)
{
case WM_CREATE:
nid.cbSize = sizeof(nid);
nid.hWnd = hwnd;
nid.uID = 0;
nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
nid.uCallbackMessage = WM_USER;
nid.hIcon = LoadIcon(NULL, IDI_APPLICATION);
lstrcpy(nid.szTip, szAppName);
Shell_NotifyIcon(NIM_ADD, &nid);
break;
case WM_USER:
if (lParam == WM_LBUTTONDOWN)
MessageBox(hwnd, TEXT("Win32 API 实现系统托盘程序!"), szAppName, MB_OK);
if (lParam == WM_LBUTTONDBLCLK)
SendMessage(hwnd, WM_CLOSE, wParam, lParam);
break;
case WM_DESTROY:
Shell_NotifyIcon(NIM_DELETE, &nid);
PostQuitMessage(0);
break;
default:
/*
* 防止当Explorer.exe 崩溃以后，程序在系统系统托盘中的图标就消失
*
* 原理：Explorer.exe 重新载入后会重建系统任务栏。当系统任务栏建立的时候会向系统内所有
* 注册接收TaskbarCreated 消息的顶级窗口发送一条消息，我们只需要捕捉这个消息，并重建系
* 统托盘的图标即可。
*/
if (message == WM_TASKBARCREATED)
SendMessage(hwnd, WM_CREATE, wParam, lParam);
break;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR szCmdLine, int iCmdShow)
{
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
HWND handle = FindWindow(NULL, szWndName);
if (handle != NULL)
{
MessageBox(NULL, TEXT("Application is already running"), szAppName, MB_ICONERROR);
return 0;
}
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;
}
// 此处使用WS_EX_TOOLWINDOW 属性来隐藏显示在任务栏上的窗口程序按钮
hwnd = CreateWindowEx(WS_EX_TOOLWINDOW,
szAppName, szWndName,
WS_POPUP,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL, NULL, hInstance, NULL);
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}