private int PrivateShow(IntPtr hwndOwner, out bool verificationFlagChecked, out int radioButtonResult)
{
verificationFlagChecked = false;
radioButtonResult = 0;
int result;
if (!TaskDialog.IsAvailable)
{
// Hand it off to emulator.
_emulateTaskDialog = new EmulateTaskDialog(this);
try
{
if (hwndOwner == IntPtr.Zero)
{
_emulateTaskDialog.ShowDialog();
}
else
{
_emulateTaskDialog.ShowDialog(new WindowHandleWrapper(hwndOwner));
}
verificationFlagChecked = _emulateTaskDialog.TaskDialogVerificationFlagChecked;
radioButtonResult = _emulateTaskDialog.TaskDialogRadioButtonResult;
result = _emulateTaskDialog.TaskDialogResult;
}
finally
{
_emulateTaskDialog.Dispose();
_emulateTaskDialog = null;
}
return(result);
}
NativeMethods.TASKDIALOGCONFIG config = new NativeMethods.TASKDIALOGCONFIG();
try
{
config.cbSize = (uint)Marshal.SizeOf(typeof(NativeMethods.TASKDIALOGCONFIG));
config.hwndParent = hwndOwner;
config.dwFlags = _flags;
config.dwCommonButtons = CommonButtons;
config.pszWindowTitle = WindowTitle;
config.MainIcon = (IntPtr)MainIcon;
if (CustomMainIcon != null)
{
config.dwFlags |= NativeMethods.TASKDIALOG_FLAGS.TDF_USE_HICON_MAIN;
config.MainIcon = CustomMainIcon.Handle;
}
if (!string.IsNullOrEmpty(MainInstruction))
{
config.pszMainInstruction = MainInstruction;
}
if (!string.IsNullOrEmpty(Content))
{
config.pszContent = Content;
}
TaskDialogButton[] customButtons = Buttons.ToArray();
if (customButtons.Length > 0)
{
// Hand marshal the buttons array.
int elementSize = Marshal.SizeOf(typeof(TaskDialogButton));
config.pButtons = Marshal.AllocHGlobal(elementSize * customButtons.Length);
for (int i = 0; i < customButtons.Length; i++)
{
Marshal.StructureToPtr(customButtons[i], (IntPtr)((long)config.pButtons + elementSize * i), false);
config.cButtons++;
}
}
TaskDialogButton[] customRadioButtons = RadioButtons.ToArray();
if (customRadioButtons.Length > 0)
{
// Hand marshal the buttons array.
int elementSize = Marshal.SizeOf(typeof(TaskDialogButton));
config.pRadioButtons = Marshal.AllocHGlobal(elementSize * customRadioButtons.Length);
for (int i = 0; i < customRadioButtons.Length; i++)
{
Marshal.StructureToPtr(customRadioButtons[i], (IntPtr)((long)config.pRadioButtons + (elementSize * i)), false);
config.cRadioButtons++;
}
}
config.nDefaultButton = DefaultButton;
config.nDefaultRadioButton = DefaultRadioButton;
if (!string.IsNullOrEmpty(VerificationText))
{
config.pszVerificationText = VerificationText;
}
if (!string.IsNullOrEmpty(ExpandedInformation))
{
config.pszExpandedInformation = ExpandedInformation;
}
if (!string.IsNullOrEmpty(ExpandedControlText))
{
config.pszExpandedControlText = ExpandedControlText;
}
if (!string.IsNullOrEmpty(CollapsedControlText))
{
config.pszCollapsedControlText = CollapsedControlText;
}
config.FooterIcon = (IntPtr)FooterIcon;
if (CustomFooterIcon != null)
{
config.dwFlags |= NativeMethods.TASKDIALOG_FLAGS.TDF_USE_HICON_FOOTER;
config.FooterIcon = CustomFooterIcon.Handle;
}
if (!string.IsNullOrEmpty(Footer))
{
config.pszFooter = Footer;
}
// If our user has asked for a callback then we need to ask for one to
// translate to the friendly version.
if (Callback != null)
{
config.pfCallback = PrivateCallback;
}
config.cxWidth = Width;
using (new ActivationContext())
{
// The call all this mucking about is here for.
NativeMethods.TaskDialogIndirect(ref config, out result, out radioButtonResult, out verificationFlagChecked);
}
}
finally
{
// Free the unmanged memory needed for the button arrays.
// There is the possiblity of leaking memory if the app-domain is destroyed in a non clean way
// and the hosting OS process is kept alive but fixing this would require using hardening techniques
// that are not required for the users of this class.
if (config.pButtons != IntPtr.Zero)
{
int elementSize = Marshal.SizeOf(typeof(TaskDialogButton));
for (int i = 0; i < config.cButtons; i++)
{
Marshal.DestroyStructure((IntPtr)((long)config.pButtons + (elementSize * i)), typeof(TaskDialogButton));
}
Marshal.FreeHGlobal(config.pButtons);
}
if (config.pRadioButtons != IntPtr.Zero)
{
int elementSize = Marshal.SizeOf(typeof(TaskDialogButton));
for (int i = 0; i < config.cRadioButtons; i++)
{
Marshal.DestroyStructure((IntPtr)((long)config.pRadioButtons + (elementSize * i)), typeof(TaskDialogButton));
}
Marshal.FreeHGlobal(config.pRadioButtons);
}
}
return(result);
}