添加系统托盘图标

以下代码演示了如何在系统托盘,即桌面的右下角添加图标

把鼠标放在图标上,会显示信息.单击它会显示消息框.右击它会有菜单出现

#define WM_TRAYMESSAGE WM_USER + 1
#include <windows.h>
#include <shellapi.h>
#include "resource.h"

//过程函数的返回值都是LRESULT,类型都是CALLBACK
LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam);
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPTSTR lpszCmdLine,int nCmdShow)
{
HWND hwnd; //主窗口句柄,在CreateWindow中赋值
MSG msg; //消息变量,在GetMessage中使用
WNDCLASS wndclass; //窗口类
TCHAR* szAppName = TEXT("Tray"); //类名和窗口名
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); //窗口背景
wndclass.hCursor = LoadCursor(NULL,IDC_ARROW); //鼠标
wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION); //图标
wndclass.lpszClassName = szAppName; //类名
wndclass.cbClsExtra = 0; //类的额外参数
wndclass.cbWndExtra = 0; //窗口的额外参数.用于基于同一窗口类的窗口各自区分.
//在自定义对话框类时必须指定为DLGWINDOWEXTRA的大小
wndclass.lpszMenuName = NULL; //菜单名.可以用作子窗口的id
wndclass.style = CS_HREDRAW | CS_VREDRAW; //窗口风格
wndclass.lpfnWndProc = WndProc; //窗口过程
wndclass.hInstance = hInstance; //包含窗口过程的实例句柄

if( !RegisterClass(&wndclass) ) //注册窗口类
return 0;
hwnd = CreateWindow( //创建窗口
szAppName, //窗口类名
szAppName, //窗口标题
WS_OVERLAPPEDWINDOW | WS_VSCROLL, //窗口风格
CW_USEDEFAULT, //初始的x坐标
CW_USEDEFAULT, //初始的y坐标
CW_USEDEFAULT, //初始的宽度
CW_USEDEFAULT, //初始的高度
NULL, //父窗口
NULL, //菜单
hInstance, //和窗口相关的实例句柄
NULL //额外参数
);
ShowWindow( hwnd,nCmdShow ); //显示窗口
UpdateWindow( hwnd ); //更新窗口
while( GetMessage(&msg,NULL,0,0) ) //消息循环
{
TranslateMessage(&msg); //将WM_XXXKEYXXX消息翻译为WM_CHAR消息
DispatchMessage(&msg); //传递消息到窗口过程
}
return msg.wParam; //返回
}
LRESULT WINAPI WndProc( HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam )
{
static NOTIFYICONDATA nid;
static HMENU hMainMenu;
static HMENU hPopupMenu;
static HINSTANCE hInstance;
switch( message )
{
case WM_CREATE:
{
hInstance = ((LPCREATESTRUCT)lParam)->hInstance;

hMainMenu = (HMENU)LoadMenu(hInstance, TEXT("TRAYMENU"));
hPopupMenu = GetSubMenu(hMainMenu, 0);

nid.cbSize = sizeof(nid);
nid.hIcon = (HICON)LoadIcon( hInstance, TEXT("TRAYICON") );
nid.hWnd = hwnd;
nid.uCallbackMessage = WM_TRAYMESSAGE;
nid.uID = 1;
nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
lstrcpy( nid.szTip, TEXT("This is a Tray Icon!"));

Shell_NotifyIcon(NIM_ADD, &nid);

return 0;
}
case WM_DESTROY:
Shell_NotifyIcon(NIM_DELETE, &nid);
PostQuitMessage(0);
return 0;
case WM_TRAYMESSAGE:
{
switch( lParam )
{
case WM_LBUTTONDOWN:
MessageBox(hwnd, TEXT("LBUTTONDOWN in TrayIcon!"),
TEXT("TrayIcon"), MB_OK);
return 0;
case WM_RBUTTONDOWN:
{
POINT point;
GetCursorPos( &point );
SetForegroundWindow(hwnd);
TrackPopupMenu(hPopupMenu, TPM_LEFTALIGN,
point.x, point.y, 0, hwnd, NULL);
return 0;
}
}
}
case WM_COMMAND:
switch( LOWORD(wParam) )
{
case IDM_TRAY_MESSAGEBOX:
MessageBox(hwnd, TEXT("Menu Selected in TrayIcon!"),
TEXT("TrayIcon"), MB_OK);
return 0;
case IDM_TRAY_QUIT:
PostQuitMessage(0);
return 0;
}
}
return DefWindowProc( hwnd,message,wParam,lParam );
}