Message Processing 2

Appendix B message, control notification, and message image macro
B .1 some common window messages
Description of parameters of the w m command
W m c r e at e sends this message, telling the window to initialize itself to send l p a r a m to C r e at e S t r u c t, which contains
C r e a t e window () parameter; When Initialization is successful
0 should be returned
W m I n I t d I a l o g sends this message, telling the dialog box to initialize itself; send W P a r a m is the control window that receives the initial focus
After w m c r e at E message and in all pair handles, l p a r a m is createdialogparam ()
Optional parameters that are sent after the control is created in the dialog box
W m g e t m I n m a x I n f o sends this message, indicates that the window is about to be re-tuned to the window and the l p a r a m points to a m I n m a x I n f O structure,
The maximum or minimum size that must be maintained for the port. It allows the window to set its minimum and maximum sizes.
W m s I Z e sends this message, telling a window that the size of the sent W P a r A M is a flag to distinguish window
Maximize, minimize, or just reset the size.
L p a r a m tells the size of the new window
W m Pa I n t send this message, telling the window to draw its customer zone W P a r a m is the drawing device Environment
W m d e S t r o y send this message, telling a window to resend all w p a r a m and l p a r a m is not used
Anything on board
W m n C r e at e sends this message, telling a window that is initializing the phase used by non-sending l p a r a m to w m _ c r e at E
Same C r e at e S t r u c t structure in customer Zone
W m n c d e S t r o y sends this message, telling a window that w p a r a m and l p a r a m are not in use in a non-customer Zone
Destroyed
W m n c pa I n t send this message, telling a window to draw its non-sending W P a r A M has a painting area handle, Region
The customer zone is described in Chapter 4th.
W m e r a s e B K g n d send this message, telling a window to erase the background to send W P a r a m specifies the device environment to be erased (
Drawn and filled rectangles)
W m s h o w I n d o W send this message, tell the window to show or hide your own hair if W P a r a m is not 0, the window is displayed
W m e n a B l e sends this message, telling a window to enable or disable sending. If W P a r a m is not 0, the window is enabled.
Yourself
W m I n I t m e n u p o p u p send this message, tell the window its system menu or send W P a r A M has the handle of the menu object, l p a r a m's
The main menu will be opened with the low-level word to indicate the sub-menu position, if l P a r a m's
If the value is not 0, the system menu is displayed.
W m h e l p sends this message, telling a window that the F1 key has been pressed and issued l p a r a m contains a pointer of an h e l p I n f O structure,
Structure contains the help needed to process context
Information
W m o u s e m o v e when the mouse moves to its customer zone, it is sent to a hair w p a r a m to indicate whether there is a keyboard s h I f t -c t r l-a l t
When the window key is pressed, l p a r a m indicates
New cursor position
W m l B u t to n d o W n when the left mouse button is pressed in the customer area, the sent and sent are the same as W M O U S E M O V E
To this window
W m l B u t to n u p. When the left mouse button is released in the customer area of the window, it is the same as W M O U S E M O V E
Sent to this window
(Continued)
Description of parameters of the w m command
W m l B u t to n d B L C L K when the left mouse button is double-clicked in the customer area, the sent mail is the same as w m o u s e m o v e, but note that,
To this window, There is no window in the c s _ d B L C l k s window class style.
Do not accept messages in this window
W m r B u t to n d o W n hair is the same as w m l B u t to n d B L C L K, but this is the same as w m o u s e m o v e, but here is
W m r B u t to n u p is right-click and right-click
W m r B u t to n d B L C L K
W m k e y d o W n when a key is pressed, it is sent to the owner key w p a r a m contains virtual key Code , L P a r a m package
Disk focus window-except that the l t key is pressed and the c t r l sends additional key data
When the key is not pressed
W m k e y u p when a key is released, it is sent to the same with w m k e y d o W n
Disk focus window-except that the l t key is pressed, the C T R L
When the key is not pressed
W m c h a r is sent in w m k e y d o W n message is translated into a press w p a r a m contains this character, l p a r a m and w m _ k e y-
When the key character is sent to the window, d o W n is the same
B .2 control notification instance
B .2.1 wm_xxx control notification
Notifications sent by the Control Window
Send w m when a control key or any sub-window is created, destroyed, or clicked
R e n t n o t I f y window style sub-window _ pa r e n t n o t I f y notification to tell parent window
Buttons, combos, and ListBox are used to access w m _ c t l c o l r, w m _ d r Aw I T E M, W M _ m e a s u r e I t e m,
W m _ d e l e t e I t e m, w m _ c h a RTO I t e m, w m _ v k e y to I t e m and
W m c o m pa r e I t E M notifications are sent to the parent window to tell where to draw controls
Scroll bar notification is w m h s c r o l, w m v s c r o l
B .2.2 wm_command control notification
Notifications sent by the Control Window
Static notification includes: s t n c l I c k e d, s t n d B l c l k, s t n e n a B l e, s t n d I s a B L E
Button notifications include: B n c l I c k e d, B n PA I n t, B n d I s a B l e, B n p u s h e d, B n u n p u s h e d,
B n d B l c l k, B n s e t f o c u s, B n k I l f o c u s
Editable notifications include: e n _ s e t f o c u s, e n _ k I l f o C U S, e n _ c h a N G E, E N _ u p d At e,
E n e r s Pa c e, e n m a X t e x T, e n h s c r o l, e n v s c r o l
Notification for The ListBox includes: l B n s e l c h a n g e, l B n d B l c l k, l B n s e l c a n c e l, L B N S e t f o c u s,
L B n k I l f o c u s
The notification for a combo box includes: c B n s e l c h a n g e, c B n d B l c l k, c B n s e t f o c u s, c B n k I l f o c u s,
C B n _ e d I t c h a n g e, c B n _ e d I t u p D at E, c B N _ D R o p D O W n, c B N _ c l o s e u p,
C B n s e l e n d o k, C B N S E L E N D C A N C E L
324 Part 5 Appendix
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B .2.3 wm_notify control notification
Notifications sent by the Control Window
Animation, progress indicator slider indicator only available: n m o u to f m e m o ry
The fine-tuning button only provides: n m o u to f m e m o ry and u d n d e lta p o s. For notifications of u d n d e LTA p o s,
N m h d r is the header pointing to n m u P d o W n Structure
The tab only provides: n m _ o u to f m e m o ry, t C n _ k e y d o W n, t C n _ s e l c h a n g e,
T c n _ s e l c h a n g I n g. When the notification is t C n _ k e y d o W n, n m h d r is pointing
N m t c k e y d o W n structure Header
The Tree View control only provides: t v n _ s e l c h a n g I n g, t v n _ s e l c h a n g e d, t v n _ g e t d I s p I n f o,
T v n _ s e t d I s p I n f o, t v n _ I t e m e x pa n d I n g, t v n _ I t e m e x pa n d e d,
T v n _ B e g I n d r a G, t v n _ B e g I n r d r a g, t v n _ d e l e t e I t e m,
T v n B e g I n l a B e l e d I t, t v n e n d l a B e l e d I t
Only general notification messages are provided: n m _ o u to f m e m o ry, n m _ c l I c k, n m _ d B L C L K,
N m _ r e t u r n, n M _ r c l I c k, n m _ r d B L C L K, N M _ s e t f o C u s,
N m k I l f o C U S, N M C U S to M D R aw, N M H O V E R
Based on the sent notifications only, the n m h d r structure can be one of the following structures: n m T v d I s p I n f o,
N m t v k e y d o W n, n m t v c u s to m d r aw
The list control only provides: LV n I t e m c h a n g I n g, LV n I t e m c h a n g e d, LV n I n s e rt I t e m,
Lv n _ d e l e t e I t e m, lv n _ d e l e t e a L I t E M S, LV N _ C O L u m n c l I C K,
Lv n _ B e g I n d r a G, lv n _ B e g I n r a G, lv n _ o d c a c h e h I n t,
Lv n _ I t e m a c t I vat e, lv n _ o d s tat e c h a n g e d, lv n _ o d f I n d I t e m,
Lv n _ B e g I n l a B e l e d I t, lv n _ e n d l a B e l e d I t, LV N _ g e t d I s p I n f o,
Lv n s e t d I s p I n f o, LV n k e y d o W n, LV n m a r q u e B e g I n
Only the notification messages listed above are provided.
Based on the sent notifications only, the n m h d r structure can be one of the following structures: n m LV d I s p I n f o,
N m lv k e y d o W n
B .2.4 control window with wm_command and wm_y y Control notifications
Notifications sent by the Control Window
Notifications for the multi-Info edit series w m n o t I f y Control: e n m s g f I lt e r, e n r e q u e S t r e s I Z E, E N S E L C H a N G E,
E n _ d r o p f I L E S, e n _ p r o t e c t e d, e n _ c o r e c t e x T, e n _ s to P n o u n d o,
E n _ I m e c h a n g e, e n _ s AV e c l I p B o a r d, e n _ o l e o p fa I L e d,
E n o B j e c t p o s I t I o n s, e n l I n k, e n d r a G D R o p d o n e
B .3 window message image macro
Appendix B message, control notification, and message image macro 325
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Macro
O n _ m e s a g e (w m _ x, H a n d l e r)
For example:
O n _ m e s a g e (w m _ c r e at E, m y
H A n d l e r)
O n m e s a g e (w m Pa I n t, m y h a n
D l e r)
O n w m x
For example:
O n w m c r e at E ()
O n w m D e S t r o y ()
Description
Any window message can be processed.
W m _ x is the value of any window message,
H A n d l e r can be any name
Each standard window message can belong to it.
Its own macro, it has no parameters, and its
Name and use its w m x Design
Message Processing function call Parameters
L r e s u lt handler (wpa r a m
W p a r a m, L Param lparam)
Yes
Onxxx (Message specific) (because the parameter is
For specific messages, it is best to add class wi Z A R D
Add these macros to the Message image)
B .4 ing message
B .5 command and notification message
Macro description of message processing function call Parameters
On_command (ID, Handler) This macro makes w m c o m a n d message refers to void handler ()
To the processing function, here I d is the command I d
O n c o m a n d r a n g e (I D, in addition to allowing the message processing function to process a connected void handler (uint ID)
Command I d outside the range of idlast, Handler), which is the same as the above
326 Part 5 Appendix
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Macro
W m c t l c o l o r e f l e c t ()
W m d r Aw I T E M r e f l e c t ()
W m e a s u r e I t E M r e f l e c t ()
W m d e l e t e I t E M r e f l e c t ()
W m c h a RTO I t E M r e f l e c t ()
W m v k e y to I t E M r e f l e c t ()
W m c o m pa r e I t E M r e f l e c t ()
W m h s c r o l r e f l e c t ()
W m v s c r o l r e f l e c t ()
W m pa r e n t n o t I f y R E L E c t ()
O n _ c o n t r o l _ r e f l e c t (n C o d e,
H A n d l e r)
O n C o n t r o l r e f l e c t e x (n C o d e,
H A n d l e r)
O n o t I f y R E F L E c t (n C o d e, H a n d l e r)
O n _ n o t I f y _ R E F L E C T _ e x (n C o d e,
H A n d l e r)
Description
These macros allow control windows
Controls of the w m _ x Type
Notice: the notification is sent to the parent window.
Port ing to the control window
This
This macro allows control window processing
W m _ c o m a n d type
Controls are notified by the parent window.
Maps to the control window.
The N c o d e of is the control notification code,
H A n d l e r is the selected
Italian name
Besides the message processing function
Out of a Boolean value, which is in the upper phase
If the Boolean value is t r u e,
The parent window is also allowed to process the cancellation
Information
This macro allows control window processing
W m n o t I f y type controls
Notification, which is reflected in the parent window
In the control window
N C o d e is the notification code, and
H A n d l e r is any
Name
In addition to the processing function
The value is the same as the value above.
If the returned value is t r u e
Allow the parent window to process the message
Message Processing function call Parameters
Hbrush ctlcolor (CDC *, uint)
Void drawitem (lpdraw I t E M S T R U C T)
Void measureitem (lpmeasureitemstruct)
Void deleteitem (lpdeleteitemstruct)
Int charto I t e m (u I n t, Unit)
Int vkeyto I t e m (u I n t, Unit)
Int compareitem (lpcompa r e I t E M S T R U C T)
Void hscroll (uint, uint)
Void vscroll (uint, uint)
Void parentnotify (uint, lpa r a m)
Void handler ()
Bool handler ()
Void handler (nmhdr * pnotifystruct,
L r e s u lt * result)
Bool handler (nmhdr * pnotifystruct,
L r e s u lt * result)
(Continued)
Macro description of message processing function call Parameters
On_command_ex (ID, Handler) should be the same as above, but now the processing function bool handler (uint ID)
Returns a Boolean value. If the value is
Fa l s e, on1_msg () is allowed to continue
Scan the message image to find another message.
Function
On_command_ex_range (ID, except that I D is a range, with the bool handler (uint)
I d l A S T, H a n d l e r) Same
On_control (ncode, ID, Handler) This macro makes the w m _ c o m a n d control pass void handler ()
Message Processing Function
On_control_range (ncode, ID, except that the control I D is allowed to be a range, void handler (uint ID)
Idlast, Handler) is the same as above
On_xxx_xxxx (ID, Handler) Example:
On_bn_doubleclicked (ID, which indicates that each wm_xxx control has its own void handler ()
H A n d l e r); unique macro, which only transmits n C o d e
On_control ()
On_handy (ncode, ID, Handler) This macro enables the w m n o t I f y Control to notify void handler (nmhdr *, lresult *)
Oriented processing functions
On_policy_range (ncode, ID, except that the control I D is allowed to be a range, void handler (uint ID, nmhdr *,
Idlast, Handler) is the same as l r e s u lt *)
On_policy_ex (ncode, ID, Handler) should be the same as above, but here the processing function bool handler (uint ID, nmhdr *,
Returns a Boolean value. If the value is l r e s u lt *)
Fal s e, allow on1_msg () to continue scanning
Trace the message image to find another processing function
On_policy_ex_range (ncode, in addition to allowing I D TO BE A range, with bool handler (uint ID, nmhdr *,
ID, idlast, Handler) with the same surface l r e s u lt *)
Appendix B message, control notification, and message image macro 327
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