C / C++ / MFC

if ((pMsg->message == WM_KEYDOWN))// && (pMsg->hwnd == m_hWnd))
{
    if (pMsg->wParam == VK_RETURN)
    {
        return TRUE;
    }
}

Return value : Nonzero if the message was translated and should not be dispatched; zero if the message was not translated and should be dispatched.

if (focusonedit)

 {do stuff}

else

return TRUE

if (focusonedit)

 {
    do stuff

    return TRUE
}

<br />
BOOL CMyPropertyPage::OnApply() <br />
{<br />
      return FALSE;<br />
}<br />

<br />
if ((pMsg->message == WM_KEYDOWN) && ((int)pMsg->wParam == VK_RETURN))<br />
	{<br />
		if (pMsg->hwnd != this->m_cLCtrlIntroduccio.GetSafeHwnd())<br />
		{<br />
			return TRUE;<br />
		}<br />
	}<br />

<br />
MyClass::OnReturnLctrlIntroduccio(NMHDR* pNMHDR, LRESULT* pResult) /*event of the CListCtrl class */<br />
{<br />
	AfxMessageBox("return detected in the ListCtrl");<br />
	*pResult = 0;<br />
}<br />

_bstr_t bstrText = L"text";
//You can let CString do the conversion from wchar to char:
CString strText = (LPCWSTR)bstrText;
//or let _bstr_t do it:
CString strText2 = (LPCSTR)bstrText;

_bstr_t ab = SOmethingDoneTo (a) 

char* pszText = "this is a text"; //This works
wchar_t* pszwText = L"so is this"; //This works also

char* pszText2 = L"doesn't work"; 
//This generates a compiler error - can't convert from wchar to char

wchar* pszwText2 = "doesn't work either"
//this also generates compiler error.

CString strText = _T("This is a text");
_bstr_t bstrText = (LPCTSTR)strText;
//Now _bstr_t will construct itself from a LPCTSTR - ususally a const char*

_bstr_t b_dataBaseName = SysAllocString (dataBaseName);

error C2664: 'SysAllocString' : cannot convert parameter 1 from 'char *' to 'const unsigned short *'

USES_CONVERSION;

_bstr_t b_databaseName = T2W( dataBaseName );

error C2664: 'MakeDB' : cannot convert parameter 1 from 'class _bstr_t' to 'unsigned short ** '

	  char* dataBaseName = new char[dataBaseName0.GetLength() +1];

	  strcpy(dataBaseName, dataBaseName0);
	
//	  BSTR b_dataBaseName = SysAllocString (dataBaseName);

	  USES_CONVERSION;
	  
	  _bstr_t b_dataBaseName = T2W( dataBaseName );
	   char* strFile = new char[strFile0.GetLength() +1];

	  strcpy(strFile, strFile0);

//	  _bstr_t b_strFile = SysAllocString (strFile);

	  _bstr_t b_strFile = T2W(strFile);

      _Class1Ptr ptr;
 
       ptr.CreateInstance(__uuidof(Class1));

        ptr->MakeDB( b_strFile, b_dataBaseName);

//	      ptr->MakeDB( LPCTSTR(strFile), LPCTSTR(dataBaseName));

//		SysFreeString (b_dataBaseName);

//		SysFreeString (b_strFile);

                delete[] etc

USES_CONVERSION;

LPCWSTR pszwDatabaseName = T2W( (LPCTSTR)dataBaseName0 );
LPCWSTR pszwFileName = T2W( (LPCTSTR)strFile0 );

_Class1Ptr ptr;        
ptr.CreateInstance(__uuidof(Class1));
ptr->MakeDB( pszwFileName, pszwDatabaseName );

error C2664: 'MakeDB' : cannot convert parameter 1 from 'const unsigned short *' to 'unsigned short **

Public Function MakeDB(txtPMAFilename As String, dataBaseName As String)