C / C++ / MFC Discussion Boards

Hello all,

I remember a time when I would have answered this question but alas... memory is failing me...

I am using a WH_CALLWNDPROC hook procedure to add a menu item in a context menu I don't own.

InsertMenu(menu,0,MF_BYPOSITION|MF_STRING,IDM_MYITEM,"Menu Item");

Where IDM_MYITEM is defined as 500.

The item is being added and when clicked a command is fired...
However when I capture the WM_COMMAND message the IDM_MYITEM value is nowhere to be found in the wParam of the message. What am I missing?

Thank you in advance for your response

Alberto Bar-Noy
Project Manager
http://www.consist.co.il

Alberto Bar-Noy wrote:
...the IDM_MYITEM value is nowhere to be found in the wParam of the message.

How are you verifying this?

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

I am checking the LOWORDof the wParam where according to documentation the menu item identifier should be...

Alberto Bar-Noy
Project Manager
http://www.consist.co.il

Hi All!

just wanted to ask, if i have a function which expects a LPCTSTR.. is it ok to call it as shown below

func(LPCTSTR lp)
{
....
}

1) CString str="something";
func(str);

2) LPWSTR str="something"; <-- just a sample, not sure how to set a LPWSTR type
func((LPCTSTR)str);

thanks!

me

ginjikun wrote:
is it ok to call it as shown below

Coding schemes aside, yes. If it wasn't, the compiler would surely complain.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

1) one is OK.

2) is bad, since it will work only on UNICODE builds. it is better:

LPTSTR str = _T("something");
func(str);

BTW: The L prefix does the magic for wide character literals, for instance

LPWSTR str = L"something"

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

Hi, thanks for the reply!

the assignment is just a sample.. however i am more concern with how FUNC is being called. you mentioned it will work only on UNICODE. what if the project is compiled with _MBCS, will FUNC((LPCTSTR)str) still work?

thanks!

me

if you define _MBCS instead of _UNICODE then FUNC((LPCTSTR)str) expects const char * but you're passing instead a
const wchar_t *. the pointer types are quite different and you're forcing the latter into the former with static cast, i.e. mistake.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

Hi, thanks again.

since it is an mfc project i just cast it to CString instead.
func((CString)LPWSTR)

i think this should be ok... ???

me

ginjikun wrote:
i think this should be ok... ???

That works thanks to temporary CString object's constructor
(it perforforms the conversion).
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

ginjikun wrote:
1) CString str="something";
func(str);

ok.

ginjikun wrote:
2) LPWSTR str="something"; <-- just a sample, not sure how to set a LPWSTR type

LPWSTR str = L"something";
LPCWSTR str = L"something";

ginjikun wrote:
func((LPCTSTR)str);

requires care. in this case if your project is unicode, it is safe.

hi Rajkumar R, what if the project is compile with _MBCS? will it still be ok?

thanks

No, it is not ok. My previous statements is still correct.

func((LPCTSTR)str);
requires care. in this case if your project is unicode, it is safe.

ginjikun wrote:
what if the project is compile with _MBCS? will it still be ok?

with the project settings, whenever the LPCTSTR is defined as LPCWSTR it is safe, as the str is of type LPWSTR. AFAIK, MBCS is not wide character, so passing wide character to function taking MBCS is not safe.

mostly, Wide character and single character is used without any precautions simply using generic text mapping functions, but MBCS requires additional handling like (You must keep track of which bytes are lead bytes).

And see The Complete Guide to C++ Strings, Part II - String Wrapper Classes[^].

Hi,

I want to implement 'Spell Check' option in my application. I don't know how to do this ?? Can any one please tell me how to do this or provide me some links for this.

Thanks in advance

Sanjeeva K.

Sanjeeva Kumar K wrote:
provide me some links

links[^]

led mike

I want to implement 'View' option in my application. I don't know how to do this ?? Can any one please tell me how to do this or provide me some links for this.

Roll eyes | :rolleyes:

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Sanjeeva Kumar K wrote:
I don't know how to do this ??

You could start by using CP's search facility.

http://www.codeproject.com/info/search.aspx?artkw=spell+check&sbo=kw[^]

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Hi,

I want to implement 'Bookmark' option in my application. I don't know how to do this ?? Can any one please tell me how to do this or provide me some links for this.

Thanks in advance

Sanjeeva K.

Sanjeeva Kumar K wrote:
I want to implement 'Bookmark' option in my application. I don't know how to do this ?? Can any one please tell me how to do this

Start by defining the functionality required for this "Bookmark option". (HINT: These are called functional requirements)

led mike

Sanjeeva Kumar K wrote:
I want to implement 'Bookmark' option in my application.

Care to explain?

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Iam using 2 processes A and B of which B creates a dialog.
Process A runs an infinite loop until the dialog is destroyed by B.
Iam using the FindWindow() to see if the dialog is present in A ,it is succeding even after the dialog is destroyed by B.

Can anyone let me know the way to completely destroy the dialog?

krishnan.s wrote:
Can anyone let me know the way to completely destroy the dialog?

Send it a WM_CLOSE message.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

krishnan.s wrote:
Can anyone let me know the way to completely destroy the dialog?

Use a big hammer.

BTW how do you know that process A was effectively terminated?
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

CPallini wrote:
Use a big hammer.

lol !!!