Window in VC Plus Plus

Create the window:

The window class define general properties of window. CreateWindow function allow user to create window.

Structure of CreateWindow( ) function:

HWND=CreateWindow(       

 window class name,

                                                 window caption,

                                                 window style,

                                                 initial x position,

                                                 initial y position,

                                                 width,

                                                 height,

                                                 parent window handler,

                                                 program instance handler,

                                                 create parameter

                                      );

1.    Display the window:

ShowWindow( ) fucntion is used to display a window which is created using CreateWindow( ) fucntion.

Syntax:

ShowWindow(hwnd, windowmode);

·        The first argument is the handle to the window created by CreateWindow.

·        The second argument is the window mode.

There are three modes available:

§  SW_SHOWNORMAL

§  SW_SHOWMAXIMIZED

§  SW_SHOWMINNOACTIVE

2.    Update the window:

     Update window function is called when current window is modified or changed. For example if a window is moved from its current position or resized then then UpdateWindow( ) function is called to update current window.

UpdateWindow call windows paint by sending window handler with message WN_PAINT.