Windows API Guide: WaitForSingleObject Function

---

Type WNDCLASSEX   cbSize As Long   style As Long   lpfnWndProc As Long   cbClsExtra As Long   cbWndExtra As Long   hInstance As Long   hIcon As Long   hCursor As Long   hbrBackground As Long   lpszMenuName As String   lpszClassName As String   hIconSm As Long End Type

Description & Usage

The WNDCLASSEX structure holds all of the information defining a window class. This information is used by any windows which belong to the class.

Visual Basic-Specific Issues

None.

Data Members

cbSize

The size in bytes of the structure.

style

A combination of the following flags specifying various styles to give to windows which belong to the class:

CS_BYTEALIGNCLIENT

Align the window's client area horizontally on the byte boundary.

CS_BYTEALIGNWINDOW

Align the window horizontally on the byte boundary.

CS_CLASSDC

Have all windows belonging to the class use a single shared device context used by all threads.

CS_DBLCLKS

Send a double-click message to the window procedure whenever the user double-clicks the mouse inside the window.

CS_GLOBALCLASS

Allow any application to create a window from this class. (If this flag is not specified, only the instance registering the class is allowed to use it.) The window class must be defined in a dynamic link library loaded at startup.

CS_HREDRAW

Redraw the entire window if a movement or size change alters the width of the window's client area.

CS_NOCLOSE

Disable the Close command on the window's menu.

CS_OWNDC

Give each window belonging to the class its own device context.

CS_PARENTDC

Set the clipping region of a child window equal to that of its parent window, allowing the child to draw on the parent.

CS_SAVEBITS

Save as a bitmap the portion of the screen image obscured by the window. This bitmap is then used to redraw the screen when the window is removed. Using this consumes more resources.

CS_VREDRAW

Redraw the entire window if a movement or size change alters the height of the window's client area.

lpfnWndProc

A pointer to the WindowProc hook function used for the window procedure which processes all of messages of each window belonging to the class.

cbClsExtra

The number of extra bytes to allocate following the window class structure for additional storage.

cbWndExtra

The number of extra bytes to allocate following the window instance structure for additional storage.

hInstance

A handle to the instance which contains the window procedure for the class.

hIcon

A handle to the window class's icon.

hCursor

A handle to the window class's cursor.

hbrBackground

A handle to the brush used to fill the window's background area. This can also be one of the following flags specifying the system color to use as the background color:

COLOR_ACTIVEBORDER

The color of an active window's border.

COLOR_ACTIVECAPTION

The color of an active window's caption.

COLOR_APPWORKSPACE

The color of an application's workspace.

COLOR_BACKGROUND

The color of the desktop background.

COLOR_BTNFACE

The color of a button's face.

COLOR_BTNHIGHLIGHT

The color of a button's highlight area.

COLOR_BTNSHADOW

The color of a button's shadow area.

COLOR_BTNTEXT

The color of a button's text.

COLOR_CAPTIONTEXT

The color of an active window's caption area's text.

COLOR_GRAYTEXT

The color of grayed-out text.

COLOR_HIGHLIGHT

The color of a highlight.

COLOR_HIGHLIGHTTEXT

The color of text in a highlight.

COLOR_INACTIVEBORDER

The color of an inactive window's border.

COLOR_INACTIVECAPTION

The color of an inactive window's caption.

COLOR_INACTIVECAPTIONTEXT

The color of an inactive window's caption area's text.

COLOR_MENU

The color of a menu.

COLOR_MENUTEXT

The color of a menu's text.

COLOR_SCROLLBAR

The color of a scrollbar.

COLOR_WINDOW

The color of a window.

COLOR_WINDOWFRAME

The color of a window's frame.

COLOR_WINDOWTEXT

The color of a window's text.

lpszMenuName

The name of the window class's menu resource, if any.

lpszClassName

The name of the window class.

hIconSm

A handle to the window class's small icon.

Constant Definitions

Const CS_BYTEALIGNCLIENT = &H1000 Const CS_BYTEALIGNWINDOW = &H2000 Const CS_CLASSDC = &H40 Const CS_DBLCLKS = &H8 Const CS_HREDRAW = &H2 Const CS_NOCLOSE = &H200 Const CS_OWNDC = &H20 Const CS_PARENTDC = &H80 Const CS_SAVEBITS = &H800 Const CS_VREDRAW = &H1 Const COLOR_ACTIVEBORDER = 10 Const COLOR_ACTIVECAPTION = 2 Const COLOR_APPWORKSPACE = 12 Const COLOR_BACKGROUND = 1 Const COLOR_BTNFACE = 15 Const COLOR_BTNHIGHLIGHT = 20 Const COLOR_BTNSHADOW = 16 Const COLOR_BTNTEXT = 18 Const COLOR_CAPTIONTEXT = 9 Const COLOR_GRAYTEXT = 17 Const COLOR_HIGHLIGHT = 13 Const COLOR_HIGHLIGHTTEXT = 14 Const COLOR_INACTIVEBORDER = 11 Const COLOR_INACTIVECAPTION = 3 Const COLOR_INACTIVECAPTIONTEXT = 19 Const COLOR_MENU = 4 Const COLOR_MENUTEXT = 7 Const COLOR_SCROLLBAR = 0 Const COLOR_WINDOW = 5 Const COLOR_WINDOWFRAME = 6 Const COLOR_WINDOWTEXT = 8

Used By

GetClassInfoEx, RegisterClassEx

Go back to the alphabetical Structure listing.
Go back to the Reference section index.

---

Last Modified: August 22, 1999
This page is copyright © 1999 Paul Kuliniewicz. Copyright Information Revised October 29, 2000
Go back to the Windows API Guide home page.
E-mail: [e-mail] Send Encrypted E-Mail
This page is at http://www.vbapi.com/ref/w/wndclassex.html