Display icon on the taskbar
Allen Studio Qiu Ji
The right side of the Windows 95 / Windows NT taskbar is a status area, Windows95 / Wi
NDOWSNT displays time and some small icons, which represent a specific function or
Program, click, right click or double-click these icons, will pop up function menu or program window
Port, etc. You may want to put your own program icon on the status area of the taskbar, very simple,
VC 5.0 provides a function that makes it easy to implement this feature.
Shell_notifyicon () function
This function sends a message to the system in the state area, increase, delete, or modify the system in the taskbar.
Sign. Shell_notifyi con () has two parameters:
DWORD DWMESSAGE
The message logo value is one of the following three:
NIM_ADD
Add icons in the taskbar status area
NIM_DELETE deletes icons from the taskbar status area
NIM_MODITY Modify the icon of the taskbar status area
2. PNOTIFYICONDATA PNID
Pointer to the NOTIFYICONDATA structure. The NOTIFYICONDATA structure is as follows:
Typedef struct _notifyicondata {// NID
DWORD CBSIZE; // Notifyicondata Size
HWND HWND; // Receive the window handle of the callback message
UINT UID; / / Custom Icon Sign Value
UINT UFLAGS; / / The three data members behind // are valid,
// can be made from nif_icon, nif_message and
Nif_tip combination.
Uint ucallbackMessage; // callback message
Hicon Hicon; // Icon Handle
Char sztip [64]; // prompts characters. When the mouse is moved to the taskbar
// When the status area is on the icon, the system displays the character.
Notifyicondata, * PNOTIFYICIONDATA;
How to implement the program icon and its functions in the taskbar status area
1. Firstly create a single document project file.
2. Add a custom message in stdafx.h:
// Tune message
#define myWM_notifyicon WM_USER 1
/ / Show icon in the taskbar status area
#define mywm_showappAppiconic WM_USER 2
3. Add a definition message processing function in Mainfrm.h, which looks like
under:
protected:
// {{AFX_MSG (CMAINFRAME)
AFX_MSG Void OnsysCommand (uint nid, lparam lparam); //
Industrial plus
AFX_MSG Void Onmyiconnotify (WPARAM WPARAM, LPARAM LPARAM
);
AFX_MSG Void OnshowappAppiconic (WPARAM WPARAM, LPARAM LPARA
m); // Handmade
AFX_MSG void onclose (); // System generated
//}} AFX_MSG
Declare_message_map ()
In addition, you need to define a switch value in Mainfrm.h, and the recorder window is turned on or off.
status:
Bool BoolWndhadshow;
4. Implement message mapping and message processing functions in Mainfrm.cpp. Message mapping department
The points look as follows:
Begin_MESSAGE_MAP (CMAINFRAME, CFRAMEWND)
// {{AFX_MSG_MAP (CMAINFRAME)
ON_MESSAGE (MyWM_Notifyicon, Onmyiconnotify)
ON_MESSAGE (MyWM_SHOWAPPICONIC, ONSHOWAPPICONIC)
ON_WM_SYSCOMMAND ()
ON_WM_CLOSE ()
//}} AFX_MSG_MAP
END_MESSAGE_MAP ()
Message processing and related functions are as follows:
// Add icon in the taskbar status area
Bool MyTaskbaraddCdon (HCON HICON, LPSTR LPSZTIP)
{
BOOL RES;
Notifyicondata TNID;
Tnid.cbsize = sizeof (notifyicondata);
Tnid.hwnd = hwnd;
TNID.UID = UID;
Tnid.uflags = nif_icon | NIF_TIP | NIF_MESSAGE;
TNID.UCALLBACKMESSAGE = MYWM_NOTIFYICON;
TNID.HICON = HICON;
IF (LPSZTIP)
LSTRCPYN (TNID.SZTIP, LPSZTIP, SIZEOF (TNID.SZTIP));
Else
TNID.SZTIP [0] = '/ 0';
Res = shell_notifyico n (nim_add, & tnid);
IF (Hicon)
DESTROYICI (HICON);
Return res;
}
// Remove the icon from the task bar status area
BOOL MyTaskbardeleteicon (HWND HWND, UINT UID)
{
BOOL RES;
Notifyicondata TNID;
Tnid.cbsize = sizeof (notifyicondata);
Tnid.hwnd = hwnd;
TNID.UID = UID;
RES = shell_notifyicon (Nim_Delete, & TnID);
Return res;
}
// Process icon callback message MYWM_NOTIFYICON
Void CMAINFRAME :: Onmyiconnotify (WPARAM WPARAM, LPARAM L
PARAM)
{
UINT NID;
Uint umousemsg;
NID = (uint) WPARAM;
Umousemsg = (uint) LPARAM;
IF (umousemsg == wm_lbuttondown)
// click icon
{
IF (BoolWndhadShow) // If the window is opened, hide the window
ShowWindow (SW_HIDE);
Else
/ / Otherwise, the window is displayed
Showwindow (sw_shownormal);
BoolWndhadShow = ~ BoolWndhadShow;
}
}
// Message MYWM_SHOWAPPICONIC Processing function, display icon in the taskbar and hide
window
Void CMAINFRAME :: OnshowAppiconic (WPARAM WPARAM, LPARAM L
PARAM)
{
Hicon theicon = loading (AFXGETITINSTANCE-HANDLE (), Makeint
Resource (IDR_MAI NFRAME);
MytaskbaraddCon (GetsafehWnd (), 100, Theicon, _T ("Model
sequence"));
ShowWindow (SW_HIDE);
BoolWndhadShow = false;
}
When the program is closed, you need to delete the icon from the task-like state area, you can add a place
The function of the WM_CLOSE message is to delete the icon. Add Processing WM_ via ClassWizard
CLOSE's function onclose (), the function is as follows:
Void cmainframe :: onClose ()
{
// Todo: add your message handler code here and / or call
DEFAULT
MyTaskBardeleteicon (GetsafehWnd (), 100);
CframeWnd :: onClose ();
When the user minimizes the window, you should hide the entire window, so to process ON_SYSCO
Mmand message. First add a function description in Mainfrm.h, as shown in the third step; then in Ma
Message mapping and implementation functions in INFRM.CPP. Message mapping as shown in front, functions
Now the following:
Void CMAINFRAME :: OnSysCommand (uint nid, lparam lparam)
{
IF (NID == SC_MINIMIZE)
{
ShowWindow (SW_HIDE);
BoolWndhadShow = false;
}
Else
CWnd :: OnSysCommand (NID, LPARAM);
}
5. Adding a statement before the InitInstance () function returns
m_pmainwnd-> postmessage (MyWM_SHOWAP- Piconic);
It is sending a custom message MYWM_SHOWAP-Piconic to make the program start
Hide Program Window and displays a small icon in the taskbar status area.
6. Now you can compile and run the program. After the program is running, click on the taskbar
The icon of the program, the system will pop up the program window, then click it and hide it.
