Windows message constant

1. WM_NULL = 0X0000:
2. WM_CREATE = 0X0001: create a window for the Application
3. WM_DESTROY = 0X0002: A window is destroyed.
4. WM_MOVE = 0X0003: Move a window
5. WM_SIZE = 0X0005: change the size of a window.
6. WM_ACTIVATE = 0X0006: A window is activated or inactive;
7. WM_SETFOCUS = 0X0007: after obtaining the focus
8. WM_KILLFOCUS = 0X0008: lost focus
9. WM_ENABLE = 0X 000A: changed the enable status.
10. WM_SETREDRAW = 0X 000B: sets whether the window can be repainted.
11. WM_SETTEXT = 0X 000C: The application sends this message to set the text of a window.
12. WM_GETTEXT = 0X 000D: The application sends this message to copy the text of the corresponding window to the buffer.
13. WM_GETTEXTLENGTH = 0X 000E: Get the length of the text related to a window (excluding empty characters)
14. WM_PAINT = 0X 000F: requires a window to redraw itself
15. WM_CLOSE = 0X0010: send a signal when a window or application is to close
16. WM_QUERYENDSESSION = 0X0011: when the user selects the end dialog box or the program calls the ExitWindows Function
17. WM_QUIT = 0X0012: Used to end the program running or when the program calls the postquitmessage Function
18. WM_QUERYOPEN = 0X0013: when the user window restores the previous size position, send the message to an icon.
19. WM_ERASEBKGND = 0X0014: when the window background must be erased (for example, when the window size changes)
20. WM_SYSCOLORCHANGE = 0X0015: when the system color changes, send this message to all top-level windows.
21. WM_ENDSESSION = 0X0016: when the system process sends the WM_QUERYENDSESSION message, the message is sent to the application to notify it whether the conversation ends.
22. WM_SYSTEMERROR = 0X0017:
23. WM_SHOWWINDOW = 0X0018: When the hidden or displayed window is sent to this window
24. WM_ACTIVATEAPP = 0X 001C: the window in which the message is sent to the application is activated and the window in which the message is not activated;
25. WM_FONTCHANGE = 0X 001D: send this message to all top-level windows when the font resource library of the system changes
26. WM_TIMECHANGE = 0X 001E: send this message to all top-level windows when the system time changes
27. WM_CANCELMODE = 0X 001F: send this message to cancel an ongoing touch (Operation)
28. WM_SETCURSOR = 0X0020: If the mouse causes the cursor to move in a window and the mouse input is not captured, a message is sent to a window.
29. WM_MOUSEACTIVATE = 0X0021: When the cursor is in an inactive window and the user is pressing a key of the mouse to send this message to the current window
30. WM_CHILDACTIVATE = 0X0022: send this message to the MDI subwindow. When the user clicks the title bar of this window, or the window is activated, move, and change the size.
31. WM_QUEUESYNC = 0X0023: the message is sent by a computer-based training program and is separated by the WH_JOURNALPALYBACK hook program.
32. WM_GETMINMAXINFO = 0X0024: This message is sent to the window when it is about to change the size or position;
33. WM_PAINTICON = 0X0026: send to the minimization window when the icon is to be repainted
34. WM_ICONERASEBKGND = 0X0027
35. WM_NEXTDLGCTL = 0X0028: send this message to a dialog box program to change the focus position
36. WM_SPOOLERSTATUS = 0X 002A: This message is sent whenever a job is added or removed in the print management queue.
37. WM_DRAWITEM = 0X 002B: When the visual appearance of buttons, combobox, listbox, and menu changes, this message is sent to the owner of these empty parts.
38. WM_MEASUREITEM = 0X 002C: When a button, combobox, listbox, listviewcontrol, or ormenuitem is created, this message is sent to the control owner.
39. WM_DELETEITEM = 0X 002D: When thelistbox or combobox is destroyed or some items are deleted, messages are sent through LB_DELETESTRING, LB_RESETCONTENT, CB_DELETESTRING, or CB_RESETCONTENT.
40. WM_VKEYTOITEM = 0X 002E: This message has an LBS_WANTKEYBOARDINPUT style sent to its owner to respond to the WM_KEYDOWN message.
41. WM_CHARTOITEM = 0X 002F: the message is sent to its owner by a list box in the LBS_WANTKEYBOARDINPUT style to respond to the WM_CHAR message.
42. WM_SETFONT = 0X0030: When drawing text, the program sends this message to obtain the color used by the control.
43. WM_GETFONT = 0X0031: The application sends this message to obtain the font of the text drawn by the current control.
44. WM_SETHOTKEY = 0X0032: The application sends this message to connect a window to a hotkey.
45. WM_GETHOTKEY = 0X0033: The application sends this message to determine whether the hotkey is associated with a window.
46. WM_QUERYDRAGICON = 0X0037: This message is sent to the minimal window. When this window is to be dragged and its class does not have a defined icon, the application can return an icon or cursor handle, this icon or cursor is displayed when you drag and drop an icon.
47. WM_COMPAREITEM = 0X0039: send this message to determine the relative position of the newly added items in combobox or listbox
48. WM_GETOBJECT = 0X 003D:
49. WM_COMPACTING = 0X0041: The Display memory is very small.
50. WM_WINDOWPOSCHANGING = 0X0046: When the size and position of the window to which the message is sent are about to be changed, call the setwindowpos function or other window management functions.
51. WM_WINDOWPOSCHANGED = 0X0047: When the size and position of the window to which the message is sent have been changed, call the setwindowpos function or other window management functions.
52. WM_POWER = 0X0048: (applicable to 16-bit windows) This message is sent when the system is about to pause
53. WM_COPYDATA = 0X 004A: This message is sent when an application transmits data to another application.
54. WM_CANCELJOURNAL = 0X 004B: when a user cancels the program log activation status, submit the message to the program
55. WM_NOTIFY = 0X 004E: when an event of a control has occurred or the control needs to obtain some information, send the message to its parent window.
56. WM_INPUTLANGCHANGEREQUEST = 0X0050: when the user selects an input language or the hotkey of the input language changes
57. WM_INPUTLANGCHANGE = 0X0051: When the platform site has been changed, this message is sent to the affected top-level window.
58. WM_TCARD = 0X0052: send this message to the application when the program has initialized the windows Help routine
59. WM_HELP = 0X0053: the message indicates that the user presses F1. If a menu is activated, the user sends the message to the menu associated with this window, otherwise, the message will be sent to the window with focus. If there is no focus at present, the message will be sent to the current active window.
60. WM_USERCHANGED = 0X0054: when the user has logged on or exited, this message is sent to all windows. When the user logs on or exits, the system updates the user's specific settings, the system sends this message immediately when the user updates the settings;
61. wm_policyformat = 0X0055: public control. The custom control and its parent window use this message to determine whether the control uses the ANSI or UNICODE structure in the WM_NOTIFY message, this control enables communication between a control and its parent control.
62. WM_CONTEXTMENU = 0X 007B: When you right-click a window, the message is sent to the window.
63. WM_STYLECHANGING = 0X 007C: send this message to the window when you call the SETWINDOWLONG function to change the style of one or more windows.
64. WM_STYLECHANGED = 0X 007D: This message is sent to the window when one or more windows of the SETWINDOWLONG function are called.
65. WM_DISPLAYCHANGE = 0X 007E: when the resolution of the monitor changes, this message is sent to all windows.
66. WM_GETICON = 0X 007F: This message is sent to a window to return the handle of the large icon or small icon associated with a window;
67. WM_SETICON = 0X0080: The program sends this message to associate a new large icon or thumbnail with a window;
68. WM_NCCREATE = 0X0081: When a window is created for the first time, the message is sent before the WM_CREATE message is sent;
69. WM_NCDESTROY = 0X0082: This message notifies a window in which non-customer zones are being destroyed.
70. WM_NCCALCSIZE = 0X0083: send this message when the customer region of a window must be calculated
71. WM_NCHITTEST = 0X0084: move the mouse, hold down or release the mouse
72. WM_NCPAINT = 0X0085: The program sends this message to a window when the frame of the window must be drawn;
73. WM_NCACTIVATE = 0X0086: the message is sent to a window only when its non-customer zone needs to be changed to show whether the message is active or not;
74. WM_GETDLGCODE = 0X0087: sends this message to a control associated with the dialog box program. The orientation key and TAB key of the windows Control allow the input to enter this control by responding to the WM_GETDLGCODE message, an application can treat it as a special input control and process it.
75. WM_NCMOUSEMOVE = 0X 00A0: When the cursor moves in a non-customer area of a window, this message is sent to the window. The non-customer area is the title bar of the form and the border body of the window.
76. WM_NCLBUTTONDOWN = 0X 00A1: this message is submitted when the cursor is in a non-customer area of a window and the left mouse button is pressed simultaneously.
77. WM_NCLBUTTONUP = 0X 00A2: This message is sent when the user releases the left mouse button and the cursor is in a non-customer zone;
78. WM_NCLBUTTONDBLCLK = 0X 00A3: This message is sent when you double-click the left mouse button and move the cursor to a window outside the customer zone.
79. WM_NCRBUTTONDOWN = 0X 00A4: This message is sent when you right-click the user and the cursor is in a non-customer area of the window.
80. WM_NCRBUTTONUP = 0X 00A5: This message is sent when the user releases the right mouse and the cursor is in a non-customer area of the window.
81. WM_NCRBUTTONDBLCLK = 0X 00A6
82. WM_NCMBUTTONDOWN = 0X 00A7: This message is sent when you press the middle mouse button and the cursor is in a non-customer area of the window.
83. WM_NCMBUTTONUP = 0X 00A8: This message is sent when the user releases the middle mouse button and the cursor is in a non-customer area of the window.
84. WM_NCMBUTTONDBLCLK = 0X 00A9
85. WM_KEYFIRST = 0X0100:
86. WM_KEYDOWN = 0X0100: press the next key.
87. WM_KEYUP = 0X0101: release a key
88. WM_CHAR = 0X0102: press a key and the WM_KEYDOWN and WM_KEYUP messages have been sent.
89. WM_DEADCHAR = 0X0103: when you use the translatemessage function to translate the WM_KEYUP message, this message is sent to the window with focus
90. WM_SYSKEYDOWN = 0X0104: When you press ALT and other keys, submit the message to the window with focus;
91. WM_SYSKEYUP = 0X0105: when the user releases a key and the ALT key is pressed, the message is submitted to the window with focus
92. WM_SYSCHAR = 0X0106: When the WM_SYSKEYDOWN message is translated by the TRANSLATEMESSAGE function, submit the message to the window with focus
93. WM_SYSDEADCHAR = 0X0107: When the WM_SYSKEYDOWN message is translated by the TRANSLATEMESSAGE function, this message is sent to the window with focus
94. WM_INITDIALOG = 0X0110: send this message to a dialog box program before it is displayed. This message is often used to initialize the control and execute other tasks.
95. WM_COMMAND = 0X0111: When you select a menu command item or when a control sends a message to its parent window, a shortcut key is translated
96. WM_SYSCOMMAND = 0X0112: this message is received when the user selects a command in the window menu or when the user chooses to maximize or minimize the value.
97. WM_TIMER = 0X0113: a timer event occurs.
98. WM_HSCROLL = 0X0114: when a standard horizontal scroll bar of a window generates a rolling event, this message is sent to that window and the control that owns it.
99. WM_VSCROLL = 0X0115: when a standard vertical scroll bar of a window generates a rolling event, this message is sent to that window and the control that owns it.
100. WM_INITMENU = 0X0116: This message is sent when a menu is to be activated. It occurs in an item in the user menu bar or presses a menu key, which allows the program to change the menu before display.
101. WM_INITMENUPOPUP = 0X0117: send this message when a drop-down menu or sub-menu is to be activated. It allows the program to change the menu before it is displayed, instead of changing all
102. WM_MENUSELECT = 0X 011F: send this message to the menu owner when a menu item is selected (usually a window)
103. WM_MENUCHAR = 0X0120: When the menu has been activated and the user presses a key (different from the acceleration Key), this message is sent to the menu owner;
104. WM_ENTERIDLE = 0X0121: When a modal dialog box or menu enters the no-load status, this message is sent to its owner, when a modal dialog box or menu enters the no-load status, it waits in the queue after processing one or more previous messages without messages.
105. WM_MENURBUTTONUP = 0X0122:

106. WM_MENUDRAG = 0X0123:

107. WM_MENUGETOBJECT = 0X0124:

108. WM_UNINITMENUPOPUP = 0X0125:
109. WM_MENUCOMMAND = 0X0126:

110. WM_CHANGEUISTATE = 0X0127:

111. WM_UPDATEUISTATE = 0X0128:

112. WM_QUERYUISTATE = 0X0129:
113. WM_CTLCOLORMSGBOX = 0X0132: send the message to the owner window of the message box before drawing the message box in windows, in the owner window, you can set the text and background color of the message box by using the given handle of the display device.
114. WM_CTLCOLOREDIT = 0X0133: When an edit control is to be drawn, send this message to its parent window: by responding to this message, in the owner window, you can set the text and background color of the edit box by using the given handle of the display device.
115. WM_CTLCOLORLISTBOX = 0X0134: When a list box control is to be drawn, send this message to its parent window; by responding to this message, in the owner window, you can set the text and background colors of the list box by using the given handle of the display device.
116. WM_CTLCOLORBTN = 0X0135: When a button control is to be drawn, this message is sent to its parent window. By responding to this message, in the owner window, you can set the text and background color of the button by using the handle of the specified display device.
117. WM_CTLCOLORDLG = 0X0136: When a dialog box control is to be drawn, send this message to its parent window; by responding to this message, in the owner window, you can set the text background color of the dialog box by using the corresponding display device handle.
118. WM_CTLCOLORSCROLLBAR = 0X0137: When a scroll bar control is to be drawn, this message is sent to its parent window. By responding to this message, in the owner window, you can set the background color of the scroll bar by using the corresponding display device handle.
119. WM_CTLCOLORSTATIC = 0X0138: send this message to its parent window when a static control is to be drawn. In response to this message, in the owner window, you can set the text and background color of the static control by using the given handle of the display device.
120. WM_MOUSEMOVE = 0X0200: move the mouse
121. WM_LBUTTONDOWN = 0X0201 press the left mouse button
122. WM_LBUTTONUP = 0X0202: Release the left mouse button
123. WM_LBUTTONDBLCLK = 0X0203: double-click the left mouse button
124. WM_RBUTTONDOWN = 0X0204: Right-click
125. WM_RBUTTONUP = 0X0205: Right-click to release
126. WM_RBUTTONDBLCLK = 0X0206: Right-click
127. WM_MBUTTONDOWN = 0X0207: Right-click
128. WM_MBUTTONUP = 0X0208: Release the middle mouse button
129. WM_MBUTTONDBLCLK = 0X0209: Double-click
130. WM_MOUSEWHEEL = 0X 020A: send the message a control with current focus when the mouse wheel turns
131. WM_PARENTNOTIFY = 0X0210: When the MDI child window is created or destroyed, or the user presses the mouse key and the cursor sends the message to its parent window in the Child Window
132. WM_ENTERMENULOOP = 0X0211: the Main Window of the application that sends this message has entered the menu loop mode.
133. WM_EXITMENULOOP = 0X0212: the Main Window of the application sending this message has exited the menu loop mode.
134. WM_NEXTMENU = 0X0213:
135. WM_SIZING = 532: when the user is adjusting the window size, send the message to the window. The message application can monitor the window size and position and modify them.
136. WM_CAPTURECHANGED = 533: send this message to the window when it loses the captured mouse;
137. WM_MOVING = 534: when a user sends a message in a mobile window, the message application can monitor the window size and position and modify them;
138. WM_POWERBROADCAST = 536: This message is sent to the application to notify it of power management events;
139. WM_DEVICECHANGE = 537: send this message to the application or device driver when the hardware configuration of the device changes.
140. WM_IME_STARTCOMPOSITION = 0X 010D:
141. WM_IME_ENDCOMPOSITION = 0X 010E:
142. WM_IME_COMPOSITION = 0X 010F:
143. WM_IME_KEYLAST = 0X 010F:
144. WM_IME_SETCONTEXT = 0X0281:
145. WM_IME_NOTIFY = 0X0282:
146. WM_IME_CONTROL = 0X0283:
147. WM_IME_COMPOSITIONFULL = 0X0284:
148. WM_IME_SELECT = 0X0285:
149. WM_IME_CHAR = 0X0286:
150. WM_IME_REQUEST = 0X0288:
151. WM_IME_KEYDOWN = 0X0290:
152. WM_IME_KEYUP = 0X0291:
153. WM_MDICREATE = 0X0220: The application sends this message to the multi-document customer window to create an MDI subwindow.
154. WM_MDIDESTROY = 0X0221: The application sends this message to the customer window of multiple documents to close an MDI subwindow.
155. WM_MDIACTIVATE = 0X0222: The application sends this message to the customer window of multiple documents to notify the customer window to activate another MDI subwindow. When the customer window receives this message, it sends a WM_MDIACTIVE message to the MDI subwindow (not activated) to activate it;
156. WM_MDIRESTORE = 0X0223: The program sends this message to the MDI customer window so that the subwindow is restored from the maximum to 293.
157. WM_MDINEXT = 0X0224: The program sends this message to the MDI customer window to activate the next or previous window.
158. WM_MDIMAXIMIZE = 0X0225: The program sends this message to the MDI customer window to maximize an MDI subwindow;
159. WM_MDITILE = 0X0226: The program sends this message to the MDI customer window and rearranges all MDI child windows in Tiled mode.
160. WM_MDICASCADE = 0X0227: The program sends this message to the MDI customer window and rearranges all MDI child windows in a stacked manner.
161. WM_MDIICONARRANGE = 0X0228: The program sends this message to the MDI customer window to rearrange all the minimized MDI child windows.
162. WM_MDIGETACTIVE = 0X0229: The program sends this message to the MDI customer window to find the handle of the activated subwindow.
163. WM_MDISETMENU = 0X0230: The program sends this message to the MDI customer window, replacing the sub-Window Menu With the MDI menu
164. WM_ENTERSIZEMOVE = 0X0231:
165. WM_EXITSIZEMOVE = 0X0232:
166. WM_DROPFILES = 0X0233:
167. WM_MDIREFRESHMENU = 0X0234:
168. WM_MOUSEHOVER = 0X 02A1:
169. WM_MOUSELEAVE = 0X 02A3:
170. WM_CUT = 0X0300: The program sends this message to an edit box or combobox to delete the selected text.
171. WM_COPY = 0X0301: The program sends this message to an edit box or combobox to copy the selected text to the clipboard.
172. WM_PASTE = 0X0302: The program sends this message to editcontrol or combobox to obtain data from the clipboard.
173. WM_CLEAR = 0X0303: The program sends this message to editcontrol or combobox to clear the selected content;
174. WM_UNDO = 0X0304: The program sends this message to editcontrol or combobox to cancel the last operation.
175. WM_RENDERFORMAT = 0X0305;
176. WM_RENDERALLFORMATS = 0X0306:
177. WM_DESTROYCLIPBOARD = 0X0307: send this message to the clipboard owner when the ENPTYCLIPBOARD function is called.
178. WM_DRAWCLIPBOARD = 0X0308: This message is sent to the first window of the clipboard observation chain when the content of the clipboard changes; it allows the clipboard observation window to display the new content of the clipboard;
179. WM_PAINTCLIPBOARD = 0X0309: When the Clipboard contains data in the CF_OWNERDIPLAY format and the client area of the clipboard observation window needs to be re-painted;
180. WM_VSCROLLCLIPBOARD = 0X 030A:
181. WM_SIZECLIPBOARD = 0X 030B: When the Clipboard contains data in the CF_OWNERDIPLAY format and the size of the client area in the clipboard observation window has changed, the message is sent to the clipboard owner through the clipboard observation window;
182. WM_ASKCBFORMATNAME = 0X 030C: send this message to the clipboard owner through the clipboard observation window to request the name of a clipboard in CF_OWNERDISPLAY format.
183. WM_CHANGECBCHAIN = 0X 030D: send this message to the first window of the clipboard observation chain when a window is moved from the clipboard observation chain;
184. WM_HSCROLLCLIPBOARD = 0X 030E: the message is sent to the clipboard owner through a clipboard observation window. It occurs when data in the CFOWNERDISPALY format of the clipboard package and an event is on the horizontal scroll bar of the clipboard observation window; the owner should scroll the clipboard image and update the value of the scroll bar;
185. WM_QUERYNEWPALETTE = 0X 030F: This message is sent to the window that will receive the focus, which gives the window the opportunity to implement its logical palette when receiving the focus.
186. WM_PALETTEISCHANGING = 0X0310: This message notifies all applications when an application is about to implement its logical palette.
187. WM_PALETTECHANGED = 0X0311: This message is sent to all top-level and overlapping windows after implementing its logical palette in a window with focus to change the system palette.
188. WM_HOTKEY = 0X0312: this message is submitted when you press the hotkey registered by the REGISTERHOTKEY function.
189. WM_PRINT = 791: The application sends this message only when WINDOWS or other applications send a request requesting to draw a part of an application;
190. WM_PRINTCLIENT = 792:
191. WM_HANDHELDFIRST = 856:
192. WM_HANDHELDLAST = 863:
193. WM_PENWINFIRST = 0X0380:
194. WM_PENWINLAST = 0X 038F:
195. WM_COALESCE_FIRST = 0X0390:
196. WM_COALESCE_LAST = 0X 039F:
197. WM_DDE_FIRST = 0X 03E0:
198. WM_DDE_INITIATE = WM_DDE_FIRST + 0: a dde client program submits this message and starts a session with the server program to respond to the specified program and topic name;
199. WM_DDE_TERMINATE = WM_DDE_FIRST + 1: a dde application (whether the client or server) submits this message to terminate a session;
200. WM_DDE_ADVISE = WM_DDE_FIRST + 2: a dde client program submits this message to a DDE Service Program requesting the server to update the data whenever the data item changes
201. WM_DDE_UNADVISE = WM_DDE_FIRST + 3: a dde client notifies a DDE Service program not to update the specified item or a special clipboard format item.
202. WM_DDE_ACK = WM_DDE_FIRST + 4: This message notifies a DDE (Dynamic Data Exchange) program that it has received and is processing the token, WM_DDE_EXECUTE, WM_DDE_DATA, Token, expires, or WM_DDE_INITIAT message.

203. WM_DDE_DATA = WM_DDE_FIRST + 5: a dde Service Program submits this message to the DDE client program to pass a data item to the customer or notify the customer of an available data item.
204. WM_DDE_REQUEST = WM_DDE_FIRST + 6: a dde client program submits this message to a DDE Service Program to request the value of a data item;
205. WM_DDE_POKE = WM_DDE_FIRST + 7: a dde client program submits the message to a DDE Service Program. The client uses the message to request the server to receive an unapproved data item; the server replies to the WM_DDE_ACK message and prompts whether the server receives the data item;
206. WM_DDE_EXECUTE = WM_DDE_FIRST + 8: a dde client program submits this message to a DDE Service Program to send a string to the server for processing like a serial command, the server responds by submitting the WM_DDE_ACK message;
207. WM_DDE_LAST = WM_DDE_FIRST + 8:
208. WM_APP = 0X8000:
209. WM_USER = 0X0400: This message helps the application customize private messages. A notification message refers to a message in which a subcontrol in a window has something to do, the parent window needs to be notified. The notification message is only applicable to standard window controls such as buttons, list boxes, Combo boxes, and edit boxes, as well as Windows 95 public controls such as tree views and list views. For example, clicking or double-clicking a control, selecting some text in the control, and the scroll bar of the operation control will generate a notification message.
210. BN_CLICKED: the user clicked the button.
211. BN_DISABLE: the button is disabled.
212. BN_DOUBLECLICKED: the user double-clicked the button.
213. BN_HILITE: the button is highlighted by the user.
214. The BN_PAINT button should be repainted.
215. BN_UNHILITE should be highlighted to remove the combo box
216. The list box of the CBN_CLOSEUP combo box is closed.
217. The CBN_DBLCLK user double-clicked a string
218. The list box of the CBN_DROPDOWN combo box is pulled out.
219. The CBN_EDITCHANGE user modified the text in the edit box.
220. The text in the CBN_EDITUPDATE edit box is about to be updated.
221. The CBN_ERRSPACE combo box has insufficient memory.
222. The CBN_KILLFOCUS combo box loses the input focus.
223. CBN_SELCHANGE selected an item in the combo box
224. The selection of CBN_SELENDCANCEL users should be canceled
225. CBN_SELENDOK users' selection is legal
226. The CBN_SETFOCUS combo box obtains the input focus edit box.
227. The text in the EN_CHANGE edit box has been updated.
228. Insufficient memory in the EN_ERRSPACE edit box
229. The EN_HSCROLL user clicked the horizontal scroll bar.
230. The EN_KILLFOCUS edit box is missing the input focus.
231. The content inserted by EN_MAXTEXT is truncated.
232. EN_SETFOCUS edit box to get the input focus
233. The text in the EN_UPDATE edit box will be updated
234. The EN_VSCROLL user clicks the vertical scroll bar message meaning list box
235. The LBN_DBLCLK user double-clicked an item
236. The LBN_ERRSPACE ListBox has insufficient memory.
237. The LBN_KILLFOCUS list box is losing the input focus.
238. LBN_SELCANCEL selected to be canceled
239. LBN_SELCHANGE selected another item
240. LBN_SETFOCUS list box to get the input focus