private int BrowserCallBack(IntPtr hWnd, int uMsg, IntPtr wParam, IntPtr lParam)
{
if (uMsg == (int)BrowseForFolderMessages.BFFM_INITIALIZED)
{
Win32SDK.SendMessage(hWnd, (int)BrowseForFolderMessages.BFFM_SETSELECTIONW, 1, m_initDir);
}
return(0);
}
public DialogResult ShowDialog()
{
BROWSEINFO bi = new BROWSEINFO();
bi.pszDisplayName = IntPtr.Zero;
bi.lpfn = IntPtr.Zero;
bi.lpfn = BrowserCallBack;
bi.lParam = IntPtr.Zero;
bi.lpszTitle = "Select Folder";
IntPtr idListPtr = IntPtr.Zero;
IntPtr pszPath = IntPtr.Zero;
try
{
if (m_strTitle.Length != 0)
{
bi.lpszTitle = m_strTitle;
}
bi.ulFlags = (int)m_Flags;
bi.pszDisplayName = Marshal.AllocHGlobal(256);
// Call SHBrowseForFolder
idListPtr = Win32SDK.SHBrowseForFolder(bi);
// Check if the user cancelled out of the dialog or not.
if (idListPtr == IntPtr.Zero)
{
return(DialogResult.Cancel);
}
// Allocate ncessary memory buffer to receive the folder path.
pszPath = Marshal.AllocHGlobal(256);
// Call SHGetPathFromIDList to get folder path.
bool bRet = Win32SDK.SHGetPathFromIDList(idListPtr, pszPath);
// Convert the returned native poiner to string.
DirectoryPath = Marshal.PtrToStringAuto(pszPath);
DisplayName = Marshal.PtrToStringAuto(bi.pszDisplayName);
}
catch (Exception ex)
{
Trace.WriteLine(ex.Message);
return(DialogResult.Abort);
}
finally
{
// Free the memory allocated by shell.
if (idListPtr != IntPtr.Zero)
{
Marshal.FreeHGlobal(idListPtr);
}
if (pszPath != IntPtr.Zero)
{
Marshal.FreeHGlobal(pszPath);
}
Marshal.FreeHGlobal(bi.pszDisplayName);
}
return(DialogResult.OK);
}
