Converting char to LPCWSTR

I recently switched from Dev-C++ to VS 2005 but when i try compiling this program:

Code:

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#include "stdafx.h"
#include <windows.h>

int main()
{
    MessageBox(NULL,"Text.","Caption.",MB_OK);
    return 0;
}

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it says that it can't convert char[4] to LPCWSTR.
This compiled perfectly fine in Dev-C++. Is there any setting that i need to change to get it to work?

This -

Quote:

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Originally Posted by Bliutte

This compiled perfectly fine in Dev-C++.

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...even if it compiled fine is not correct.

Your parameters are actually wrong.
MessageBox API accepts a TCHAR string.

The correct way to call it is -

Code:

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        MessageBox(NULL,_T ("Text."),_T("Caption."),MB_OK);

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You faced the compile error on MSVC because _UNICODE was defined, and not on Dev C++.

Ok, thanks for the quick reply! :)

You are welcome... ;)

Does this work with strings? I tried this:

Code:

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char text = (char)"Text.";
MessageBox(NULL,_T (text), _T ("Caption."),MB_OK);

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That gave this error:

Code:

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error C2065: 'Ltext' : undeclared identifier

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How do i get it to work with strings?

And it also said:

Code:

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error C2440: 'initializing' : cannot convert from 'const char [6]' to 'char'

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before i put (char) before "Text.". Is there any way to make VC convert it automatically?

Quote:

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Originally Posted by Bliutte

Does this work with strings? I tried this:

Code:

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char text = (char)"Text.";

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I hope you realize that the variable called text is not a string - it is a character.

The correct code would be -

Code:

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const char* text = "Text.";

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And...

Quote:

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Originally Posted by Bliutte

it also said:

Code:

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error C2440: 'initializing' : cannot convert from 'const char [6]' to 'char'

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...Look, it actually told you just what I did.

It said that you cannot assign a string (i.e. a character array) to a single character.

Also, like I said before, Win APIs like MessageBox typically accept TCHAR strings... So, your text variable should correct be -

Code:

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const TCHAR* text = _T ("Text.");

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And the call to MessageBox would be -

Code:

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MessageBox(NULL, text, _T ("Caption."),MB_OK);

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Quote:

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Originally Posted by Bliutte

How do i get it to work with strings?

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You can always use C++ std::string or std::wstring class by including <string>

If your MSVC project is one with MFC support, you can also use CString (wraps TCHAR string).

Oh, sorry about that stupid post. I guess i am too tired right now. :o
Thanks for the reply though.

I had a similar problem. I made the following chnages

MessageBox(NULL, _T(errorMsg), _T("socketIndication"), MB_OK);

Now it says: _T identifier not found.
Can you please help me here.

Thanks,
deve06

Quote:

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Originally Posted by deve06

I had a similar problem. I made the following chnages

MessageBox(NULL, _T(errorMsg), _T("socketIndication"), MB_OK);

Now it says: _T identifier not found.
Can you please help me here.

Thanks,
deve06

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you need to include tchar.h
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also if you dont want to include tchar or use that you do this .

LPCWSTR Hello = L"salam";
MessageBox(NULL, L"Text.", Hello, MB_OK);

_T() is a funtion of Tchar that do the magic , but you need to include tchar.h , you can use L"somestring" . done.

Quote:

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Originally Posted by Punsher2011

[...]
_T() is a funtion of Tchar that do the magic [...]

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_T() is not a function but a macro.

Quote:

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Originally Posted by ovidiucucu

_T() is not a function but a macro.

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sorry , my mistake ! :blush:

Quote:

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Originally Posted by Punsher2011

sorry , my mistake ! :blush:

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You also made the mistake of reviving a 7 year old thread. :p

Quote:

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Originally Posted by OReubens

You also made the mistake of reviving a 7 year old thread. :p

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And the mistake of not identifying that the _T() macro doesn't work with a variable (i.e. _T(errorMsg) is incorrect).