Actions for the title menu bar of a Windows window--delete/disable min max session and close

HWND hand = FindWindow (NULL, "calculator");

int nstyle = GetWindowLong (hand, Gwl_style);
Nstyle &= ~ (ws_maximizebox);
SetWindowLong (hand, Gwl_style, nstyle);//Discard Maximize button
Nstyle &= ~ (ws_minimizebox);
SetWindowLong (hand, Gwl_style, nstyle);//Discard Minimized button

Delete the system menu for the entire calculator
Nstyle &= ~ (ws_sysmenu);
SetWindowLong (hand, Gwl_style, nstyle);//Discard System Menu

HWND HMenu = GetSystemMenu (hand, false);
DeleteMenu (HMenu, Sc_move, Mf_bycommand);//Do not let move
DeleteMenu (HMenu, Sc_size, Mf_bycommand);//not allowed to change size
DeleteMenu (HMenu, Sc_maximize, Mf_bycommand);//Do not maximize
DeleteMenu (HMenu, Sc_minimize, Mf_bycommand);//Don't let Minimize
DeleteMenu (HMenu, Sc_restore, Mf_bycommand);//Do not let restore
DeleteMenu (HMenu, Sc_close, Mf_bycommand);//do not let off
EnableMenuItem (HMenu, Sc_close, mf_disabled);//Disable the Close button (redraw form is not OK)

Window Style constants:

Ws_boder window has a thin border
Ws_caption window with title bar (contains Ws_boder)
Ws_child Create a child window (this style cannot be used with Ws_popup)
Ws_childwindow is the same as Ws_child
Ws_cliphildren the area occupied by the child window when drawing in the parent window.
Ws_clipsblings crops the interrelated subwindow so that a special child window receives the Ws_paint message, only works on its own window. This style is only suitable for Windows with Ws_child style.
ws_disabled Create a window that is forbidden at the beginning
Ws_dlgframe creates a window with a border of a style that is typically used with a dialog box, and a window with that style cannot have a title bar.
The ws_group specifies the first control in a set of controls, the next control with the style control terminates the current control group, and the next control group is started.
Ws_hscroll window with horizontal scroll bar
Ws_vscrool window with vertical scroll bar
Ws_maximize Window initially maximized
Ws_minimize window is initially minimized
Ws_minimizebox window with minimized button
Ws_maximizebox window with maximize button
ws_overlapped overlapping window with a title bar and border
Ws_overlappedwindow has Ws_overlapped,ws_caption,ws_sysmenu,ws_thickfram,
Overlapping windows of the Ws_minimizebox,ws_maximizebox model

Ws_popup pop-up window, cannot be used with Ws_child
Ws_popupwindow a pop-up window with a ws_boder,ws_popup,ws_sysmenu style. In order for the SYSTEM menu (also called the CONTROL menu to be visible), the ws_caption must be combined with the Ws_popupwindow style.
Ws_sysmenu has the SYSTEM menu bar, you must also specify the ws_caption style
Ws_thickframe with adjustable border
Ws_visible window is initially visible

Extended window Style constants

Ws_ex_acceptfiles window to receive drag-and-drop files
Ws_ex_dlgmodalframe has a double-line border
ws_ex_noparentnotify When a child window is created or canceled, the wm_parentnotify message is not sent to its parent window

The Ws_ex_topmost window is placed above all non-top-level windows, even if the window does not work.

Extended style support for 3D appearance

Ws_ex_clientedge creates a sunken client area for the application's main workspace, such as a text window for a word-processing program

Ws_ex_staticedge creates a sunken client area for windows that are used for output only.

Actions for the title menu bar of a Windows window--delete/disable min max session and close