directory dialog box

[Maurader]

how do i create a dialog box that will prompt the user to select a directory??

 

[CMR]

you can use SHBrowseForFolder. Here's am example:


char* szResult;
BROWSEINFO bi;
memset((LPVOID)&bi, 0, sizeof(bi));
TCHAR szDisplayName[_MAX_PATH+1];
szDisplayName[0] = '\0';
bi.hwndOwner = this->m_hWnd;
bi.pidlRoot = NULL;
bi.pszDisplayName = szDisplayName;
bi.lpszTitle = "Find folder";
bi.ulFlags = BIF_RETURNONLYFSDIRS;
LPITEMIDLIST pIIL = ::SHBrowseForFolder(&bi);
BOOL bRetVal = ::SHGetPathFromIDList(pIIL, szResult);
if (!bRetVal)
{
*szResult='\0';

}
LPMALLOC pMalloc;
SHGetMalloc(&pMalloc);
pMalloc->Free(pIIL);
pMalloc->Release();


Hope this helps

CMR

 

[Maurader]

I'm getting an access violation when i get to
BOOL bRetVal = ::SHGetPathFromIDList(pIIL, szResult);

any ideas why?

 

[CMR]

Sorry, My mistake.
That code example is taken from an application I wrote some time ago and is actually the body of a function. The complete function looks like this:

BOOL CMyDialog::BrowseForFolder(char *szTitle, HWND hwndOwner, char *szResult)
{
BROWSEINFO bi;
memset((LPVOID)&bi, 0, sizeof(bi));
TCHAR szDisplayName[_MAX_PATH+1];
szDisplayName[0] = '\0';
bi.hwndOwner = hwndOwner;
bi.pidlRoot = NULL;
bi.pszDisplayName = szDisplayName;
bi.lpszTitle = szTitle;
bi.ulFlags = BIF_RETURNONLYFSDIRS;
LPITEMIDLIST pIIL = ::SHBrowseForFolder(&bi);
BOOL bRetVal = ::SHGetPathFromIDList(pIIL, szResult);
if (!bRetVal)
*szResult='\0';
LPMALLOC pMalloc;
SHGetMalloc(&pMalloc);
pMalloc->Free(pIIL);
pMalloc->Release();
return bRetVal;
}

as you can see, szResult is an output parameter of the function which is called like this:

char szOutputDir[MAX_PATH];
if(BrowseForFolder(_T("Choose file location:&quot, GetSafeHwnd(), szOutputDir))
{
m_strLocation = szOutputDir;
UpdateData(FALSE);
}

Sorry about that.
hope this sorts out the problem

CMR