error C2664: 'CWnd::SetWindowTextW' : cannot convert parameter 1 from 'const char [6]' to 'LPCTSTR'

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CString  mytext = "Hello";
((CEdit *)  GetDlgItem(IDC_EDITTITLE7))->SetWindowText(mytext);

Posted 8-Apr-15 23:16pm

Member 11482033

Updated 8-Apr-15 23:57pm

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Jochen Arndt · Answer 1 · 2015-04-09T00:15:00

Solution 1

The string "Hello" is an ANSI string. With Unicode builds, you must use a wide string by prefixing the string with the letter L. To be independant of the the Unicode setting, you can use the _T() macros which will set the prefix if necessary:

CString  mytext = _T("Hello");

Posted 9-Apr-15 0:15am

Jochen Arndt

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CPallini 9-Apr-15 6:20am

5.

Member 11482033 9-Apr-15 6:38am

I tried your suggestion but I'm getting ..

---------------------------
Microsoft Visual C++ Debug Library
---------------------------
Debug Assertion Failed!

Program: ...diaformat Latest 30-12-2014\Debug\LipsTimeCodeApplication.exe
File: f:\dd\vctools\vc7libs\ship\atlmfc\src\mfc\winocc.cpp
Line: 245

Jochen Arndt 9-Apr-15 6:51am

The line contains: ASSERT(::IsWindow(m_hWnd))

Possible reasons:
GetDlgItem(IDC_EDITTITLE7) returns NULL because there is no item with the passed ID or the control window has not been created (the CEdit class may exist but the window itself has not been created or creation failed).

So you should check first if the item exists:

CWnd *pWnd = GetDlgItem(IDC_EDITTITLE7);
ASSERT(pWnd);
if (pWnd)
pWnd->SetWindowText(mystring);

If you get now an assertion in your source file, the item does not exist.

CPallini · Answer 2 · 2015-04-09T00:25:00

Solution 2

Obligatory link: The Complete Guide to C++ Strings, Part I - Win32 Character Encodings[^].

Posted 9-Apr-15 0:25am

CPallini

error C2664: 'CWnd::SetWindowTextW' : cannot convert parameter 1 from 'const char [6]' to 'LPCTSTR'

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error C2664: 'CWnd::SetWindowTextW' : cannot convert parameter 1 from 'const char [6]' to 'LPCTSTR'

2 solutions

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Solution 2

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