程式最小化至系統工具列

所需要用到的API為Shell_NotifyIcon

BOOL Shell_NotifyIcon(
DWORD dwMessage,
PNOTIFYICONDATA lpdata
);

傳入的Message有NIM_ADD、NIM_MODIFY、NIM_DELETE、NIM_SETFOCUS、NIM_SETVERSION

其所需傳入的結構為 NOTIFYICONDATA

typedef struct _NOTIFYICONDATAA{
DWORD cbSize;
HWND hWnd;
UINT uID;
UINT uFlags;
UINT uCallbackMessage;
HICON hIcon;
#if (NTDDI_VERSION < NTDDI_WIN2K)
TCHAR szTip[64];
#endif
#if (NTDDI_VERSION >= NTDDI_WIN2K)
TCHAR szTip[128];
DWORD dwState;
DWORD dwStateMask;
TCHAR szInfo[256];
union{
   UINT  uTimeout;
   UINT  uVersion;  // Used with Shell_NotifyIcon flag NIM_SETVERSION.
} DUMMYUNIONNAME;
TCHAR szInfoTitle[64];
DWORD dwInfoFlags;
#endif
#if (NTDDI_VERSION >= NTDDI_WINXP)
GUID guidItem;
#endif
#if (NTDDI_VERSION >= NTDDI_VISTA)
HICON hBalloonIcon;
#endif
}

如有需要針對滑鼠點擊System tray裡面的Icon反應的話，則需在uCallbackMessage給定回傳之訊息。

之後再於

LRESULT CDialog::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)

裡面去接收所需要的資訊並作相對應的動作即可

Sample-縮到System Tray：

bool CMainDlg::GotoSystemTray()
{
NOTIFYICONDATA NotifyIconData;

NotifyIconData.cbSize = sizeof (NOTIFYICONDATA);
NotifyIconData.hWnd = this->m_hWnd;
NotifyIconData.uID = IDD_MAINDLG;
NotifyIconData.uFlags = NIF_MESSAGE|NIF_ICON|NIF_TIP;
NotifyIconData.hIcon = hIcon;
strcpy(NotifyIconData.szTip, "This is tip!!");
NotifyIconData.dwState = NIS_SHAREDICON;
strcpy(NotifyIconData.szInfo, "This is Info!!");
strcpy(NotifyIconData.szInfoTitle,"This is Info title!!");
NotifyIconData.dwInfoFlags = NIIF_INFO;
NotifyIconData.uCallbackMessage = WM_USER;


if ( !::Shell_NotifyIcon(NIM_ADD, &NotifyIconData) )
{
   CString cstrDis;
   cstrDis.Format("Err = %d", ::GetLastError());
   ::AfxMessageBox(cstrDis);
   return false;
}

return true;
}

WinProc code:

LRESULT CMainDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
// TODO: Add your specialized code here and/or call the base class
switch ( message )
{
   case WM_USER:                            //NOTE:滑鼠移到上面就會送這個進來了
       if ( lParam == WM_LBUTTONDBLCLK )
       {                                                         
           ::AfxMessageBox("OnMessage_Left button");
       }else if ( lParam == WM_RBUTTONDOWN ) {
           ::AfxMessageBox("OnMessage_Right button");
       }
       break;
   case WM_SYSCOMMAND:        //NOTE:OnCancel會進來到這邊
       if ( wParam == SC_MINIMIZE || wParam == SC_CLOSE)
       {
               ::AfxMessageBox("OnSystem bar");
           }
       break;
}

return CDialog::WindowProc(message, wParam, lParam);
}

Reference:http://blog.chinaunix.net/u2/67530/showart_603037.html