Get edit control data in char buffer

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Hi!
I am trying to write data in edit control and copy it in char buffer on button click event.But when I am copy buffer, it add 0 after each byte in it, so it copies half of size buffer in destination buffer and in resultant edit control also.
Why it add one more zero in char buffer?

What I have tried:

Use GetDlgItemTextW() API for copy text from edit control to char buffer as

<br />
GetDlgItemTextW(IDC_CONSOLE,(LPTSTR)buff,index);//index = number of characters entered in edit control

Read back data to destination buffer and placed it into another edit control using CString format :

CString msg;<br />
msg.Format(L"%hc",TempBuff);//TempBuff is destinaton buff<br />
			mConsoleOut.ReplaceSel(msg);

Anything wrong with this code?Please suggest!

Posted 30-May-16 19:56pm

Venkat Raghvan

Updated 30-May-16 20:45pm

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CPallini 31-May-16 2:50am

It looks you are using wide characters in a ANSI context. Are you using a UNICODE or ANSI build?

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Shmuel Zang · Accepted Answer · 2016-05-30T20:45:00

Solution 1

You set your buffer (buff) as a unicode (2 bytes for each character) string (You call the GetDlgItemTextW function which works with unicode strings and, pass a LPTSTR to it which is a wchar_t* if _UNICODE is defined.).

If you try to read buff as a char* (1 byte for each character), that can be the reason you see an additional 0 after each byte.

Posted 30-May-16 20:45pm

Shmuel Zang

Comments

Venkat Raghvan 31-May-16 5:09am

Thanks!my problem is solved,but it can read all bytes from edit control in buffer except last one.What is the reason of that?

Shmuel Zang 31-May-16 7:35am

What's the value of index? Is that the string's length?

Venkat Raghvan 31-May-16 8:25am

yes! Characters entered in edit control

Jochen Arndt 31-May-16 8:46am

The last parameter to GetDlgItemText[W] is the maximum length including the NULL character. So your buffer must have a size of at least index+1 characters and you must also pass that value.

Venkat Raghvan 31-May-16 9:37am

Ok! I already done and it works fine. Thank you for your valuable support