Article View: comp.os.ms-windows.programmer.tools.mfc
Article #39Re: HELP - CString conversion?
From: Huw Leonard
Date: Sun, 28 Jan 1996 05:13
Date: Sun, 28 Jan 1996 05:13
51 lines
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2484 bytes
In article <NEWTNews.16531.822443361.Postmaster@Jerusalem.netvision.net.il>, iti@Jerusalem.netvision.net.il says... > >When I try to read the text from a Edit Control (IDC_EDIT1) with the >following code: > >-------------------------------------------------------------- >CString callBuf; >int msgLen = GetDlgItemText(IDC_EDIT1, callBuf, sizeof(callBuf)); >-------------------------------------------------------------- > >I get the following error: > >-------------------------------------------------------------- >error C2664: 'GetDlgItemText' : cannot convert parameter 2 from 'class >::CString ' to 'char __far *' >-------------------------------------------------------------- > > >I am using Visual C++, how can I read the text directly into the CString? >I know that I am doing something REAL STUPID so if you can be of any help- If you are using CWnd::GetDlgItemText(), then the code is quite simple: int msgLen=GetDlgItemText( IDC_EDIT1, callBuf ); The compiler error is generated because Visual C++ is trying to match on one of the two over-rides: int GetDlgItemText( int nID, LPTSTR lpStr, int nMaxCount ) const; int GetDlgItemText( int nID, CString& rString ) const; (Taken directly from Visual C++ 4.0 help.) You are confusing the compiler by providing a CString reference *AND* the integer. 'Course, all bets are off if you are _NOT_ using CWnd::GetDlgItemText(). If that's the case, you've got to either allocate a separate char* buffer, or create a buffer inside the CString object with the GetBuffer() method, which has the following prototype: LPTSTR GetBuffer( int nMinBufLength ); Hope this helps. -- ____________________________________________________________ Huw Leonard "To secure ourselves against defeat lies in our own hands, but the opportunity of defeating the enemy is provided by the enemy himself. Hence the saying: One may _know_ how to conquer without being able to _do_ it." - Sun Tzu, The Art Of War
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Path: arc1-ca.pugleaf.net!news.interlog.com!news From: huw@interlog.com (Huw Leonard) Newsgroups: comp.os.ms-windows.programmer.tools.mfc,comp.os.ms-windows.apps.compatibility.win95,comp.lang.c++ Subject: Re: HELP - CString conversion? Date: 28 Jan 1996 05:13:34 GMT Organization: InterLog Internet Services Message-ID: <4ef0lu$346@steel.interlog.com> References: <NEWTNews.16531.822443361.Postmaster@Jerusalem.netvision.net.il> NNTP-Posting-Host: huw.interlog.com X-Newsreader: WinVN 0.99.3