please dont rip this site Prev Next

CPL_INQUIRE

The CPL_INQUIRE message is sent to the CPlApplet function of a Control Panel application to request information about a dialog box that the application supports.

CPL_INQUIRE 

uAppNum = (UINT) lParam1;     // application number 

lpcpli = (LPCPLINFO) lParam2; // structure for application info. 

 

Parameters

uAppNum
Value of lParam1. Specifies the dialog box number. This number must be in the range zero through one less than the value returned in response to the CPL_GETCOUNT message (CPL_GETCOUNT - 1).
lpcpli
Value of lParam2. Points to a CPLINFO structure. The application must fill this structure with resource identifiers for the icon, short name, description, and any user-defined value associated with the dialog box.

Return Values

If the CPlApplet function processes this message successfully, it should return zero.

Remarks

The Control Panel sends the CPL_INQUIRE message once for each dialog box supported by your application. The Control Panel also sends a CPL_NEWINQUIRE message for each dialog box. These messages are sent immediately after the CPL_GETCOUNT message. However, the system does not guarantee the order in which the CPL_INQUIRE and CPL_NEWINQUIRE messages are sent.

You can perform initialization for the dialog box when you receive CPL_INQUIRE. If you must allocate memory, do so in response to the CPL_INIT message.

On Windows 95 and Windows NT version 4.0, the system caches the information returned in the CPLINFO structure used by CPL_INQUIRE. This provides significantly better performance because the system only needs to load your application the first time the Control Panel starts up. On the other hand, the CPL_NEWINQUIRE message returns information in a form that the system cannot cache. For this reason, most CPlApplet functions should process CPL_INQUIRE and ignore CPL_NEWINQUIRE.

The only applications that should use CPL_NEWINQUIRE are those that need to change their icon or display strings based on the state of the computer. In this case, your CPL_INQUIRE handler should specify the CPL_DYNAMIC_RES value for the idIcon, idName, or idInfo members of the CPLINFO structure, rather than specifying a valid resource identifier. This causes the Control Panel to send the CPL_NEWINQUIRE message each time it needs the icon and display strings, allowing you to specify information based on the current state of the computer. Of course, this is significantly slower than using cached information.

See Also

CPL_GETCOUNT, CPL_INIT, CPL_NEWINQUIRE, CPlApplet, CPLINFO 

See also:


file: /Techref/os/win/api/win32/mess/src/msg03_15.htm, 3KB, , updated: 2000/4/7 12:14, local time: 2022/5/23 01:22,
TOP NEW HELP FIND: 
34.231.247.88:LOG IN

 ©2022 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://www.piclist.com/techref/os/win/api/win32/mess/src/msg03_15.htm"> CPL_INQUIRE</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?

  PICList 2022 contributors:
o List host: MIT, Site host massmind.org, Top posters @20220523
* Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.
 

Welcome to www.piclist.com!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .