public bool ShowDialog(IWin32Window owner)
{
_path = string.Empty;
IntPtr handle;
IntPtr zero = IntPtr.Zero;
if (owner != null)
{
handle = owner.Handle;
}
else
{
handle = UnmanagedMethods.GetActiveWindow();
}
UnmanagedMethods.SHGetSpecialFolderLocation(handle, (int)_startLocation, ref zero);
if (zero == IntPtr.Zero)
{
return(false);
}
int num = (int)_options;
if ((num & 0x40) != 0)
{
Application.OleRequired();
}
IntPtr pidl = IntPtr.Zero;
try
{
BrowseInfo lpbi = new BrowseInfo();
//IntPtr pszPath = Marshal.AllocHGlobal(MAX_PATH);
lpbi.pidlRoot = zero;
lpbi.hwndOwner = handle;
lpbi.displayName = new string('\0', MAX_PATH);
lpbi.title = _title;
lpbi.flags = num;
lpbi.callback = null;
lpbi.lparam = IntPtr.Zero;
pidl = UnmanagedMethods.SHBrowseForFolder(ref lpbi);
if (pidl == IntPtr.Zero)
{
return(false);
}
_displayName = lpbi.displayName;
StringBuilder pathReturned = new StringBuilder(MAX_PATH);
UnmanagedMethods.SHGetPathFromIDList(pidl, pathReturned);
_path = pathReturned.ToString();
UnmanagedMethods.SHMemFree(pidl);
}
finally
{
UnmanagedMethods.SHMemFree(zero);
}
return(true);
}