Win32 API实现系统托盘

这篇博客主要是讲述使用Win32 API编写一个系统托盘。实现的功能有：显示提示框、气泡、上下文菜单。要实现系

统托盘，主要用到的函数是Shell_NotifyIcon，用到的结构体是NOTIFYICONDATA。

当我们运行后，可以在任务栏中看到我们的托盘了

当我们鼠标放在托盘图标上时，单击右键就会出现上下文菜单，我的这个有两个菜单项，Exit和Hide。点击Exit退出程

序，点击Hide将会把窗口隐藏，当单击托盘图标时就可以显示隐藏的窗口了。具体效果可以下载源文件下来自己运行

看看。主要代码如下：

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){NOTIFYICONDATA  nid ;static HMENU    hMenu ;POINT           point ;HINSTANCE       hInstance ;switch (message){case WM_CREATE:hInstance = (HINSTANCE) GetWindowLong (hwnd, GWL_HINSTANCE) ;hMenu = LoadMenu (hInstance, TEXT("TuoPan")) ;hMenu = GetSubMenu (hMenu, 0) ;nid.cbSize = sizeof (NOTIFYICONDATA) ;nid.hWnd   = hwnd ;nid.uID  = IDI_ICON1 ;nid.uFlags  = NIF_MESSAGE | NIF_ICON | NIF_TIP | NIF_INFO;nid.hIcon   = LoadIcon (hInstance, MAKEINTRESOURCE(IDI_ICON1)) ;nid.uCallbackMessage = WMU_NOTIFY ;//提示框内容wcscpy_s(nid.szTip, szAppName) ;//气泡通知wcscpy_s(nid.szInfo, szAppName);  //通知的内容wcscpy_s(nid.szInfoTitle, L":)"); //气泡的标题nid.uTimeout = 10000;             //通知滞留的时间，ms为单位nid.dwInfoFlags = NIIF_NONE;      //图标Shell_NotifyIcon (NIM_ADD, &nid) ;return 0 ;case WM_COMMAND:switch (LOWORD(wParam)){case IDM_EXIT:SendMessage (hwnd, WM_DESTROY, wParam, lParam) ;return 0 ;case IDM_HIDE:ShowWindow(hwnd, SW_HIDE);return 0;}return 0 ;case WMU_NOTIFY:if(lParam == WM_RBUTTONDOWN)//托盘消息中lParam接受鼠标的行为{GetCursorPos(&point) ;SetForegroundWindow(hwnd) ;TrackPopupMenu(hMenu, TPM_RIGHTBUTTON, point.x, point.y, 0, hwnd, NULL) ;}else if(lParam == WM_LBUTTONDOWN){ShowWindow(hwnd, SW_SHOW);}return 0 ;case WM_DESTROY:nid.uID  = IDI_ICON1 ;nid.hWnd = hwnd ;Shell_NotifyIcon (NIM_DELETE, &nid) ;PostQuitMessage (0) ;return 0 ;}return DefWindowProc (hwnd, message, wParam, lParam) ;}