Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

Menus

Posted on 1998-04-22
4
Medium Priority
?
249 Views
Last Modified: 2012-05-04
OK.  This is probably the stupid question of the day, but I can't seem to find the answer.

I have created a form with a menu.  Everything is working properly, but I need to know what message is posted to the WindowProc when the menu is clicked.  For example, if someone clicks on File | Exit, and the ID of the exit menu is IDR_EXIT, what message gets posted to the WindowProc?
0
Comment
Question by:dirtdart
  • 3
4 Comments
 
LVL 11

Accepted Solution

by:
alexo earned 400 total points
ID: 1251493
WM_COMMAND.

PS.  This is a "Windows" question, not a "C" question
0
 
LVL 11

Expert Comment

by:alexo
ID: 1251494
The WM_COMMAND message is sent when the user selects a command item from a menu, when a control sends a notification message to its parent window, or when an accelerator keystroke is translated.

WM_COMMAND :

wNotifyCode = HIWORD(wParam); // notification code
wID = LOWORD(wParam);         // item, control, or accelerator identifier
hwndCtl = (HWND) lParam;      // handle of control
 
Parameters:

wNotifyCode - Value of the high-order word of wParam. Specifies the notification code if the message is from a control. If the message is from an accelerator, this parameter is 1. If the message is from a menu, this parameter is 0.

wID - Value of the low-order word of wParam. Specifies the identifier of the menu item, control, or accelerator.

hwndCtl - Value of lParam. Identifies the control sending the message if the message is from a control. Otherwise, this parameter is NULL.
 
Return Values - If an application processes this message, it should return zero.

Remarks:

Accelerator keystrokes that select items from the window menu are translated into WM_SYSCOMMAND messages.

If an accelerator keystroke occurs that corresponds to a menu item when the window that owns the menu is minimized, no WM_COMMAND message is sent. However, if an accelerator keystroke occurs that does not match any of the items in the window's menu or in the window menu, a WM_COMMAND message is sent, even if the window is minimized.

If an application enables a menu separator, the system sends a WM_COMMAND message with the low-word of the wParam parameter set to zero when the user selects the separator.

0
 
LVL 11

Expert Comment

by:alexo
ID: 1251495
There are no stupid questions.  Only stupid answers.
0
 
LVL 5

Author Comment

by:dirtdart
ID: 1251496
Well, that's what I thought in the first place.  I guess I must have typed something wrong the first time I tried it with WM_COMMAND, cause it didn't work then, but it does now.  Well, live and learn.  I just wish Microsoft would include more documentation on Win32 and not just MFC.  I personally think MFC bites and try to avoid it at every possible opportunity.

Thanks for the help.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Preface I don't like visual development tools that are supposed to write a program for me. Even if it is Xcode and I can use Interface Builder. Yes, it is a perfect tool and has helped me a lot, mainly, in the beginning, when my programs were small…
Windows programmers of the C/C++ variety, how many of you realise that since Window 9x Microsoft has been lying to you about what constitutes Unicode (http://en.wikipedia.org/wiki/Unicode)? They will have you believe that Unicode requires you to use…
The goal of this video is to provide viewers with basic examples to understand opening and writing to files in the C programming language.
Video by: Grant
The goal of this video is to provide viewers with basic examples to understand and use for-loops in the C programming language.
Suggested Courses

571 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question