system menu by API - C / C++ / MFC Discussion Boards

houari_id3-May-05 17:23

3-May-05 17:23

I am new in Visual C++. I created MDI application, and I want to disable some menu for certain function. For example, I want to disable menu with ID_MENU00 ID, when doDisableMenu() is invoked

void doDisableMenu() {

CMenu menu;
menu.EnableMenuItem(ID_MENU00, MF_GRAYED);

}

but the result is an error of 'debug assertion failed'
what should I do to disable a menu?

thank you in advance

Re: Change the property of a menu

Christian Graus3-May-05 18:07

Christian Graus

3-May-05 18:07

It doesn't work that way. When you have a menu item selected in the IDE, there are two messages you can catch. One is the click event, the other is called just before a menu item is shown. You keep a bool in your app to tell you if a menu item is disabled, and in that method, you take the menu item ( which is passed in from memory, as a pointer ), and you set if it's enabled or not using that boolean value. The same goes for check marks, etc. Any change to a menu items state happens in this event handler.

Christian Graus - Microsoft MVP - C++

Re: Change the property of a menu

David Crow4-May-05 3:09

David Crow

4-May-05 3:09

houari_id wrote:
I want to disable some menu for certain function

The preferred method for this is in the ON_UPDATE_COMMAND_UI() handler.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

syntax error C2146

mikelon3-May-05 15:03

mikelon

3-May-05 15:03

WHEN I TRY TO COMPIL, I HAVE THE NEXT MESSAGE
DEBUG WIN32
COMPILING
stdafx.cpp
C:\Program files .....\include\winnt.h(1092) error C2146: Syntax error: missing ';' before identifier 'KSPIN_LOCK'
C:\Program files .....\include\winnt.h(1092) fatal error C1004: unexpected end of file found

im working with winMe and, in some case i try to use direct x (#include <ddraw.h>)

so... help me !!!

Re: syntax error C2146

Christian Graus3-May-05 15:26

Christian Graus

3-May-05 15:26

It would help if you gave us the line in question, but the second error usually means that you have precompiled headers turned on, and you've not included stdafx.h

Christian Graus - Microsoft MVP - C++

Re: syntax error C2146

Bob Stanneveld3-May-05 22:30

Bob Stanneveld

3-May-05 22:30

Christian Graus wrote:
but the second error usually means that you have precompiled headers turned on, and you've not included stdafx.h

Won't that lead to a part of the message like: "... while looking for precompiled header."?

I also got the blogging virus..[^]

Re: syntax error C2146

David Crow4-May-05 3:07

David Crow

4-May-05 3:07

mikelon wrote:
C:\Program files .....\include\winnt.h(1092) fatal error C1004: unexpected end of file found

Check for a missing parenthesis, brace, comment, semicolon, or #endif. The file must also end with a carriage return–linefeed pair.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

system menu by API

microsoftcertificate3-May-05 13:56

microsoftcertificate

3-May-05 13:56

Could you tell me how can I get system menu by API ?

hmenu = GetSystemMenu(hWnd,1);

hmenu_options_thread1 = GetSubMenu(hmenu,1);
UINT uIDCheckItem;
uIDCheckItem = GetMenuItemID(hmenu_options_thread1,1);

smenu = new TCHAR[21];
GetMenuString(hmenu_options_thread1,uIDCheckItem,smenu,20,MF_BYCOMMAND);
MessageBox(hWnd, smenu,"Menu",MB_OK);

Thank you.

Re: system menu by API

David Crow3-May-05 16:40

David Crow

3-May-05 16:40

microsoftcertificate wrote:
Could you tell me how can I get system menu by API ?

hmenu = GetSystemMenu(hWnd,1);

This is how. What's the problem?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: system menu by API

microsoftcertificate3-May-05 22:51

microsoftcertificate

3-May-05 22:51

I want to get menu string but those lines could not give me a menu string.

Thank you.

Re: system menu by API

David Crow4-May-05 3:05

David Crow

4-May-05 3:05

This works fine for me:

char szBuffer[64];
HMENU hMenu = GetSystemMenu(hWnd, FALSE);
GetMenuString(hMenu, 0, szBuffer, sizeof(szBuffer), MF_BYPOSITION);
GetMenuString(hMenu, 1, szBuffer, sizeof(szBuffer), MF_BYPOSITION);
GetMenuString(hMenu, 2, szBuffer, sizeof(szBuffer), MF_BYPOSITION);

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

How to detect the browser version?

Cyrus Dang3-May-05 13:02

Cyrus Dang

3-May-05 13:02

Dear all,
How to detect what kind of browser is running and its version? For example, Netscape or IE; IE 5.0 or IE 6.0, ect.
Best regards,

Re: How to detect the browser version?

David Crow3-May-05 16:51

David Crow

3-May-05 16:51

Your question cannot be answered in its current form (as more than one browser can be installed at any given time). If you want to know the default browser, simply use FindExecutable().

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: How to detect the browser version?

Cyrus Dang3-May-05 16:55

Cyrus Dang

3-May-05 16:55

So, can we detect IE version?
BRs,

Re: How to detect the browser version?

Priyank Bolia3-May-05 19:33

Priyank Bolia

3-May-05 19:33

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Version I hope this will work.

http://www.priyank.in/

Re: How to detect the browser version?

David Crow4-May-05 2:08

David Crow

4-May-05 2:08

Yes, just use GetFileVersionInfo() and VerQueryValue().

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: How to detect the browser version?

Cyrus Dang4-May-05 7:48

Cyrus Dang

4-May-05 7:48

Thanks all,

Toggle line numbers in MS Visual C++ 6.0

knapak3-May-05 12:31

knapak

3-May-05 12:31

Hiya

I know this may be a VERY stupid question... but I have tried to find a way to toggle on the line numbering in MS Visual C++ 6.0... no success... anyone?

Cool | :cool:

Thanks!

Re: Toggle line numbers in MS Visual C++ 6.0

David Crow3-May-05 16:49

David Crow

3-May-05 16:49

No such option exists. The only way to know what line the cursor is on is by the Line/Col indicator down in the lower right corner next to the keyboard status indicators.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Toggle line numbers in MS Visual C++ 6.0

knapak4-May-05 8:43

knapak

4-May-05 8:43

well... that sucks... D'Oh! | :doh:

thanks anyway!

PopUp Menu

javi_jmc3-May-05 12:30

javi_jmc

3-May-05 12:30

Hi everybody,

I have created an PopUp Menu in a CDialog...it works OK.

Now I want to create a PopUp Menu inside an ActiveX every time I click Button RIGHT of the mouse...
I have copied the code inside the function WM_RBUTTONDOWN...The problem is that it shows the Menu but it is DISABLED (it is shown but I can not select an option).

How can I do it to solve it...to make it enable?

Thanks

Here the code :

HMENU hMenu = ::CreatePopupMenu();
if (NULL != hMenu)
{
// add a few test items
::AppendMenu(hMenu, MF_ENABLED | MF_STRING & !MF_GRAYED, 1, "Change Color");
::AppendMenu(hMenu, MF_ENABLED | MF_STRING & !MF_GRAYED, 2, "Hide");
::AppendMenu(hMenu, MF_ENABLED | MF_STRING & !MF_GRAYED, 3, "Item 3-");

ClientToScreen(&point);

int sel = ::TrackPopupMenuEx(hMenu,
TPM_CENTERALIGN | TPM_RETURNCMD,
point.x,
point.y,
m_hWnd,
NULL);

CString s;

s.Format("The selected item is %d", sel);
TRACE(s);

:estroyMenu(hMenu);

Re: PopUp Menu

Ryan Binns3-May-05 18:40

Ryan Binns

3-May-05 18:40

javi_jmc wrote:
& !MF_GRAYED

These parts are not necessary, and will actually screw it up and make it not work.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

How to implement delay

hithesh3-May-05 12:22

hithesh

3-May-05 12:22

How do I implement 'delay' in VC++?
I also need to find out a way to get the "time elapsed" between two commands like when the data on the serial port goes high.

Can some one also give me info on the following -
GettickCount
Dword
VERIFY
ASSERT
dwcount

Thanks in advance.

-hithesh

Re: How to implement delay

Christian Graus3-May-05 13:37

Christian Graus

3-May-05 13:37

Sleep is the command to make your app stop for a bit.

hithesh wrote:
Can some one also give me info on the following -

msdn.microsoft.com can.

hithesh wrote:
GettickCount

The GetTickCount function retrieves the number of milliseconds that have elapsed since the system was started. ( first hit on google )

hithesh wrote:
Dword

A DWORD is an unsigned long. It's a really big number.

hithesh wrote:
ASSERT

An ASSERT is a construct that will fail if the condition you pass it fails. This means that in debugging, you can check the assumptions that your code makes about the state of your application at any point. It is not included in release builds, and should be used for debugging only.

hithesh wrote:
dwcount

Is probably a variable called count, that is of type DWORD, and has been created using Hungarian notation ( where the first few letters of a camel case variable name denote the type of the variable )

Christian Graus - Microsoft MVP - C++

Re: How to implement delay

Anonymous3-May-05 14:01

Anonymous

3-May-05 14:01

Christian, Thanks for the answers.
For the delay, I knew about sleep. I need something thats similar to a timer.

like -

1. when a bit goes high
2. start timer
3. stop timer when the bit goes low.

Sleep is used when you know the amount of delay you want, right? If this is not right, plz gimme an example.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.