please dont rip this site Prev Next

CCHookProc info  Overview  Group

A CCHookProc hook procedure is an application-defined or library-defined callback procedure that is used with the Color common dialog box. The hook procedure receives messages or notifications intended for the default dialog box procedure.

UINT APIENTRY CCHookProc(

    HWND hdlg,

// handle to the dialog box window

    UINT uiMsg,

// message identifier

    WPARAM wParam,

// message parameter

    LPARAM lParam 

// message parameter

   );

Parameters

hdlg
Handle to the Color dialog box window for which the message is intended.
uiMsg
Identifies the message being received.
wParam
Specifies additional information about the message. The exact meaning depends on the value of the uiMsg parameter.
lParam
Specifies additional information about the message. The exact meaning depends on the value of the uiMsg parameter.

If the uiMsg parameter indicates the WM_INITDIALOG message, lParam is a pointer to a CHOOSECOLOR structure containing the values specified when the dialog was created.

Return Values

If the hook procedure returns zero, the default dialog box procedure processes the message.

If the hook procedure returns a nonzero value, the default dialog box procedure ignores the message.

Remarks

When you use the ChooseColor function to create a Color dialog box, you can provide a CCHookProc hook procedure to process messages or notifications intended for the dialog box procedure. To enable the hook procedure, use the CHOOSECOLOR structure that you passed to the dialog creation function. Specify the address of the hook procedure in the lpfnHook member and specify the CC_ENABLEHOOK flag in the Flags member.

The default dialog box procedure processes the WM_INITDIALOG message before passing it to the hook procedure. For all other messages, the hook procedure receives the message first. Then, the return value of the hook procedure determines whether the default dialog procedure processes the message or ignores it.

If the hook procedure processes the WM_CTLCOLORDLG message, it must return a valid brush handle for painting the background of the dialog box. In general, if the hook procedure processes any WM_CTLCOLOR* message, it must return a valid brush handle for painting the background of the specified control.

Do not call the EndDialog function from the hook procedure. Instead, the hook procedure can call the PostMessage function to post a WM_COMMAND message with the IDABORT value to the dialog box procedure. Posting IDABORT closes the dialog box and causes the dialog box function to return FALSE. If you need to know why the hook procedure closed the dialog box, you must provide your own communication mechanism between the hook procedure and your application.

You can subclass the standard controls of the common dialog box. However, the common dialog box procedure may also subclass the controls. Because of this, you should subclass controls when your hook procedure processes the WM_INITDIALOG message. This ensures that your subclass procedure receives the control-specific messages before the subclass procedure set by the dialog box procedure.

CCHookProc is a placeholder for the application-defined or library-defined function name. The LPCCHOOKPROC type is a pointer to a CCHookProc hook procedure.

See Also

ChooseColor, CHOOSECOLOR, EndDialog, PostMessage, WM_INITDIALOG, WM_CTLCOLORDLG


file: /Techref/os/win/api/win32/func/src/f04_10.htm, 5KB, , updated: 2000/4/7 12:19, local time: 2024/10/7 23:10,
TOP NEW HELP FIND: 
98.84.18.52:LOG IN
©2024 PLEASE DON'T RIP! THIS SITE CLOSES OCT 28, 2024 SO LONG AND THANKS FOR ALL THE FISH!

 ©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE!

<A HREF="http://massmind.org/techref/os/win/api/win32/func/src/f04_10.htm"> CCHookProc</A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type a nice message (short messages are blocked as spam) in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.


Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?

 

Welcome to massmind.org!

 

Welcome to massmind.org!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .