About minimizing windows to pallets in MFC implementation principles and procedures _c language

Steps/Methods
(i) principle
1, the principle of minimizing: first to hide the window, and then in the lower right corner to draw the icon.
2, the principle of restoration: The window will be displayed, and then the picture in the tray deleted.

(ii) Procedural realization
1, custom message wm_showtask:
#define WM_SHOWTASK (Wm_user + 1)
2, in the MFC
:: OnSysCommand (UINT NID, LPARAM LPARAM) function body to add a command response
if (nid==sc_minimize)
Totray (); Functions that minimize to the pallet
3, in the message map to add
On_message (Wm_showtask,onshowtask); Where Wm_showtask is the name of the message,
Onshowtask is a message response function that you define, followed by a description.

(iii) content of specific functions
1, minimize to the tray function

Copy Code code as follows:

void Cmydlg::totray ()
{
Notifyicondata nid;
Nid.cbsize= (DWORD) sizeof (NOTIFYICONDATA);
nid.hwnd=this->m_hwnd;
Nid.uid=idr_mainframe;
nid.uflags=nif_icon| nif_message| Nif_tip;
nid.ucallbackmessage=wm_showtask;//a custom message name
Nid.hicon=loadicon (AfxGetInstanceHandle (), Makeintresource (Idr_mainframe));
strcpy (Nid.sztip, "program name"); Information Tip Bar
Shell_NotifyIcon (Nim_add,&nid); Add an icon to the pallet area
ShowWindow (Sw_hide); Hide main Window
}

2. Restore interface function
To define a message response function in a header file

Copy Code code as follows:

afx_msg lresult Onshowtask (WPARAM wparam,lparam LPARAM);
WPARAM receives the ID of the icon, and lparam receives the mouse behavior
Lresult Cmydlg::onshowtask (WPARAM wparam,lparam LPARAM)
{
if (wparam!=idr_mainframe)
return 1;
Switch (LParam)
{
Case wm_rbuttonup://right button up when pop-up shortcut menu, there is only one "off"
{
Lppoint lpoint=new Tagpoint;
:: GetCursorPos (Lpoint);//Get mouse position
CMenu menu;
Menu. CreatePopupMenu ()//Declaration of a pop-up menu

Menu. AppendMenu (Mf_string,wm_destroy, "close"); Add menu item "Off", click Send Message Wm_destroy to main window (hidden), end program.
Menu. TrackPopupMenu (Tpm_leftalign,lpoint->x,lpoint->y,this); Determine the location of the pop-up menu
Hmenu Hmenu=menu. Detach ();
Menu. DestroyMenu (); Resource Recycling
Delete Lpoint;
} break;
Case WM_LBUTTONDBLCLK://Double-click the left of the processing
{
This->showwindow (sw_show)//Simple display of main window finish
Deletetray ();
} break;
Default:break;
}
return 0;
}

Remove tray icon function

Copy Code code as follows:

void CMyDlg::D eletetray ()
{
Notifyicondata nid;
Nid.cbsize= (DWORD) sizeof (NOTIFYICONDATA);
nid.hwnd=this->m_hwnd;
Nid.uid=idr_mainframe;
nid.uflags=nif_icon| nif_message| Nif_tip;
Nid.ucallbackmessage=wm_showtask; A custom message name
Nid.hicon=loadicon (AfxGetInstanceHandle (), Makeintresource (Idr_mainframe));
strcpy (Nid.sztip, "program name"); Message tip Bar for scheduled task reminders
Shell_NotifyIcon (Nim_delete,&nid); Remove icon in pallet area
}