Set the form display status (ShowWindow)

The API function ShowWindow is used to set the display state of the form. The prototype declaration is as follows:

BOOL ShowWindow (
HWND hwnd,//Handle to Window
int nCmdShow//show State
);

The first parameter hWnd specifies a handle to the window to be set. The second parameter specifies a predefined constant, with the following values:

Sw_forceminimize:
Windows 2000/xp:minimizes A window, even if the thread that owns the window
is hung. This flag should is used when minimizing windows from a different
Thread.
　　
Sw_hide:
Hides the form and activates another form.

Sw_maximize:
Maximizes the specified form.

Sw_minimize:
Minimizes a specified form and activates the next form on the z-axis (z-axis conceptual reference SetWindowPos API function).

Sw_restore:
Activates and displays a specified form, and if the form is minimized or maximized, the system restores it to a normal large
Small and position. When a minimized window is restored, the application should contain this flag.

Sw_showdefault:
Sets the show state based on the sw_value specified in the Startupinfo stru
Cture passed to the CreateProcess function by the program that started the Appli
cation.
This means that, when the program starts running, the Sw_value parameter based on the CreateProcess function
Specifies the STARTUPINFO structure to set the state.
typedef struct _STARTUPINFO {
DWORD CB;
LPTSTR lpreserved;
LPTSTR LpDesktop;
LPTSTR Lptitle;
DWORD DwX;
DWORD DwY;
DWORD dwxsize;
DWORD dwysize;
DWORD Dwxcountchars;
DWORD Dwycountchars;
DWORD Dwfillattribute;
DWORD DwFlags;
WORD Wshowwindow;
WORD CbReserved2;
Lpbyte LpReserved2;
HANDLE hStdInput;
HANDLE Hstdoutput;
HANDLE Hstderror;
} Startupinfo, *lpstartupinfo

Sw_showmaximized:
Activates a window and displays it in a maximized state.

Sw_showminimized:
Activates a window and displays it in a minimized state.

Sw_showminnoactive:
Displays a form in a minimized state, unless the form is inactive, the effect of this function is similar to
Sw_showminimized.

Sw_showna:
Displays a form at its current size and position, unless the form is inactive, or the function works like
To Sw_show.

Sw_shownoactivate:
Displays a form in the most recent state. Unless the window sill is inactive, the effect of this function is similar to
Sw_shownormal.

Sw_shownormal:
Activates and displays a form that reverts to the default size and position if the form is maximized or minimized.
This flag should be set when the program displays a window for the first time.

Typical applications:
ShowWindow (Self.handle, sw_showmaximized);
Displays a maximized form.

　　　

Set the form display status (ShowWindow)