public DialogResult ShowDialog(IWin32Window owner)
{
IntPtr handle;
IntPtr zero = IntPtr.Zero;
if (owner != null)
{
handle = owner.Handle;
}
else
{
handle = System.Design.UnsafeNativeMethods.GetActiveWindow();
}
System.Design.UnsafeNativeMethods.Shell32.SHGetSpecialFolderLocation(handle, (int)this.startLocation, ref zero);
if (zero == IntPtr.Zero)
{
return(DialogResult.Cancel);
}
int num = (int)(this.publicOptions | ((FolderNameEditor.FolderBrowserStyles)((int)this.privateOptions)));
if ((num & 0x40) != 0)
{
Application.OleRequired();
}
IntPtr pidl = IntPtr.Zero;
try
{
System.Design.UnsafeNativeMethods.BROWSEINFO lpbi = new System.Design.UnsafeNativeMethods.BROWSEINFO();
IntPtr pszPath = Marshal.AllocHGlobal(MAX_PATH);
lpbi.pidlRoot = zero;
lpbi.hwndOwner = handle;
lpbi.pszDisplayName = pszPath;
lpbi.lpszTitle = this.descriptionText;
lpbi.ulFlags = num;
lpbi.lpfn = IntPtr.Zero;
lpbi.lParam = IntPtr.Zero;
lpbi.iImage = 0;
pidl = System.Design.UnsafeNativeMethods.Shell32.SHBrowseForFolder(lpbi);
if (pidl == IntPtr.Zero)
{
return(DialogResult.Cancel);
}
System.Design.UnsafeNativeMethods.Shell32.SHGetPathFromIDList(pidl, pszPath);
this.directoryPath = Marshal.PtrToStringAuto(pszPath);
Marshal.FreeHGlobal(pszPath);
}
finally
{
System.Design.UnsafeNativeMethods.IMalloc sHMalloc = GetSHMalloc();
sHMalloc.Free(zero);
if (pidl != IntPtr.Zero)
{
sHMalloc.Free(pidl);
}
}
return(DialogResult.OK);
}
private static System.Design.UnsafeNativeMethods.IMalloc GetSHMalloc()
{
System.Design.UnsafeNativeMethods.IMalloc[] ppMalloc = new System.Design.UnsafeNativeMethods.IMalloc[1];
System.Design.UnsafeNativeMethods.Shell32.SHGetMalloc(ppMalloc);
return ppMalloc[0];
}
private static System.Design.UnsafeNativeMethods.IMalloc GetSHMalloc()
{
System.Design.UnsafeNativeMethods.IMalloc[] ppMalloc = new System.Design.UnsafeNativeMethods.IMalloc[1];
System.Design.UnsafeNativeMethods.Shell32.SHGetMalloc(ppMalloc);
return(ppMalloc[0]);
}
