/// <summary>
/// Creates, displays, and operates a task dialog. The task dialog contains application-defined messages, title,
/// verification check box, command links and push buttons, plus any combination of predefined icons and push buttons
/// as specified on the other members of the class before calling Show.
/// </summary>
/// <param name="hwndOwner">Owner window the task Dialog will modal to.</param>
/// <param name="verificationFlagChecked">Returns true if the verification checkbox was checked when the dialog
/// was dismissed.</param>
/// <param name="radioButtonResult">The radio botton selected by the user.</param>
/// <returns>The result of the dialog, either a DialogResult value for common push buttons set in the CommonButtons
/// member or the ButtonID from a TaskDialogButton structure set on the Buttons member.</returns>
private int PrivateShow(IntPtr hwndOwner, out bool verificationFlagChecked, out int radioButtonResult)
{
verificationFlagChecked = false;
radioButtonResult = 0;
int result;
UnsafeNativeMethods.TASKDIALOGCONFIG config = new UnsafeNativeMethods.TASKDIALOGCONFIG();
try
{
config.cbSize = (uint)UnsafeNativeMethods.TASKDIALOGCONFIG.SizeOf;
config.hwndParent = hwndOwner;
config.dwFlags = this.flags;
config.dwCommonButtons = this.commonButtons;
if (!string.IsNullOrEmpty(this.windowTitle))
{
config.pszWindowTitle = this.windowTitle;
}
config.MainIcon = (IntPtr)this.mainIcon;
if (this.customMainIcon != null)
{
config.dwFlags |= UnsafeNativeMethods.TASKDIALOG_FLAGS.TDF_USE_HICON_MAIN;
config.MainIcon = this.customMainIcon.Handle;
}
if (!string.IsNullOrEmpty(this.mainInstruction))
{
config.pszMainInstruction = this.mainInstruction;
}
if (!string.IsNullOrEmpty(this.content))
{
config.pszContent = this.content;
}
TaskDialogButton[] customButtons = this.buttons;
if (customButtons.Length > 0)
{
// Hand marshal the buttons array.
int elementSize = TaskDialogButton.SizeOf;
config.pButtons = MemoryAlloc.PrivateHeap.Allocate(elementSize * customButtons.Length);
for (int i = 0; i < customButtons.Length; i++)
{
unsafe // Unsafe because of pointer arithmatic.
{
byte* p = (byte*)config.pButtons;
Marshal.StructureToPtr(customButtons[i], (IntPtr)(p + (elementSize * i)), false);
}
config.cButtons++;
}
}
TaskDialogButton[] customRadioButtons = this.radioButtons;
if (customRadioButtons.Length > 0)
{
// Hand marshal the buttons array.
int elementSize = TaskDialogButton.SizeOf;
config.pRadioButtons = MemoryAlloc.PrivateHeap.Allocate(elementSize * customRadioButtons.Length);
for (int i = 0; i < customRadioButtons.Length; i++)
{
unsafe // Unsafe because of pointer arithmatic.
{
byte* p = (byte*)config.pRadioButtons;
Marshal.StructureToPtr(customRadioButtons[i], (IntPtr)(p + (elementSize * i)), false);
}
config.cRadioButtons++;
}
}
config.nDefaultButton = this.defaultButton;
config.nDefaultRadioButton = this.defaultRadioButton;
if (!string.IsNullOrEmpty(this.verificationText))
{
config.pszVerificationText = this.verificationText;
}
if (!string.IsNullOrEmpty(this.expandedInformation))
{
config.pszExpandedInformation = this.expandedInformation;
}
if (!string.IsNullOrEmpty(this.expandedControlText))
{
config.pszExpandedControlText = this.expandedControlText;
}
if (!string.IsNullOrEmpty(this.collapsedControlText))
{
config.pszCollapsedControlText = this.CollapsedControlText;
}
config.FooterIcon = (IntPtr)this.footerIcon;
if (this.customFooterIcon != null)
{
config.dwFlags |= UnsafeNativeMethods.TASKDIALOG_FLAGS.TDF_USE_HICON_FOOTER;
config.FooterIcon = this.customFooterIcon.Handle;
}
if (!string.IsNullOrEmpty(this.footer))
{
config.pszFooter = this.footer;
}
// If our user has asked for a callback then we need to ask for one to
// translate to the friendly version.
if (this.callback != null)
{
config.pfCallback = this.PrivateCallback;
}
////config.lpCallbackData = this.callbackData; // How do you do this? Need to pin the ref?
config.cxWidth = this.width;
// The call all this mucking about is here for.
UnsafeNativeMethods.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 = TaskDialogButton.SizeOf;
for (int i = 0; i < config.cButtons; i++)
{
unsafe
{
byte* p = (byte*)config.pButtons;
Marshal.DestroyStructure((IntPtr)(p + (elementSize * i)), typeof(TaskDialogButton));
}
}
MemoryAlloc.PrivateHeap.Free(config.pButtons);
}
if (config.pRadioButtons != IntPtr.Zero)
{
int elementSize = TaskDialogButton.SizeOf;
for (int i = 0; i < config.cRadioButtons; i++)
{
unsafe
{
byte* p = (byte*)config.pRadioButtons;
Marshal.DestroyStructure((IntPtr)(p + (elementSize * i)), typeof(TaskDialogButton));
}
}
MemoryAlloc.PrivateHeap.Free(config.pRadioButtons);
}
}
return result;
}
private int PrivateShow(IntPtr hwndOwner, out bool verificationFlagChecked, out int radioButtonResult)
{
verificationFlagChecked = false;
radioButtonResult = 0;
int result = 0;
UnsafeNativeMethods.TASKDIALOGCONFIG config = new UnsafeNativeMethods.TASKDIALOGCONFIG();
try
{
config.cbSize = (uint)Marshal.SizeOf(typeof(UnsafeNativeMethods.TASKDIALOGCONFIG));
config.hwndParent = hwndOwner;
config.dwFlags = this.flags;
config.dwCommonButtons = this.commonButtons;
if (!string.IsNullOrEmpty(this.windowTitle))
{
config.pszWindowTitle = this.windowTitle;
}
config.MainIcon = (IntPtr)this.mainIcon;
if (this.customMainIcon != null)
{
config.dwFlags |= UnsafeNativeMethods.TASKDIALOG_FLAGS.TDF_USE_HICON_MAIN;
config.MainIcon = this.customMainIcon.Handle;
}
if (!string.IsNullOrEmpty(this.mainInstruction))
{
config.pszMainInstruction = this.mainInstruction;
}
if (!string.IsNullOrEmpty(this.content))
{
config.pszContent = this.content;
}
TaskDialogButton[] customButtons = this.buttons;
if (customButtons.Length > 0)
{
int elementSize = Marshal.SizeOf(typeof(TaskDialogButton));
config.pButtons = Marshal.AllocHGlobal(elementSize * (int)customButtons.Length);
for (int i = 0; i < customButtons.Length; i++)
{
unsafe
{
byte* p = (byte*)config.pButtons;
Marshal.StructureToPtr(customButtons[i], (IntPtr)(p + (elementSize * i)), false);
}
config.cButtons++;
}
}
TaskDialogButton[] customRadioButtons = this.radioButtons;
if (customRadioButtons.Length > 0)
{
int elementSize = Marshal.SizeOf(typeof(TaskDialogButton));
config.pRadioButtons = Marshal.AllocHGlobal(elementSize * (int)customRadioButtons.Length);
for (int i = 0; i < customRadioButtons.Length; i++)
{
unsafe
{
byte* p = (byte*)config.pRadioButtons;
Marshal.StructureToPtr(customRadioButtons[i], (IntPtr)(p + (elementSize * i)), false);
}
config.cRadioButtons++;
}
}
config.nDefaultButton = this.defaultButton;
config.nDefaultRadioButton = this.defaultRadioButton;
if (!string.IsNullOrEmpty(this.verificationText))
{
config.pszVerificationText = this.verificationText;
}
if (!string.IsNullOrEmpty(this.expandedInformation))
{
config.pszExpandedInformation = this.expandedInformation;
}
if (!string.IsNullOrEmpty(this.expandedControlText))
{
config.pszExpandedControlText = this.expandedControlText;
}
if (!string.IsNullOrEmpty(this.collapsedControlText))
{
config.pszCollapsedControlText = this.CollapsedControlText;
}
config.FooterIcon = (IntPtr)this.footerIcon;
if (this.customFooterIcon != null)
{
config.dwFlags |= UnsafeNativeMethods.TASKDIALOG_FLAGS.TDF_USE_HICON_FOOTER;
config.FooterIcon = this.customFooterIcon.Handle;
}
if (!string.IsNullOrEmpty(this.footer))
{
config.pszFooter = this.footer;
}
if (this.callback != null)
{
config.pfCallback = new UnsafeNativeMethods.TaskDialogCallback(this.PrivateCallback);
}
config.cxWidth = this.width;
UnsafeNativeMethods.TaskDialogIndirect(ref config, out result, out radioButtonResult, out verificationFlagChecked);
}
finally
{
if (config.pButtons != IntPtr.Zero)
{
int elementSize = Marshal.SizeOf(typeof(TaskDialogButton));
for (int i = 0; i < config.cButtons; i++)
{
unsafe
{
byte* p = (byte*)config.pButtons;
Marshal.DestroyStructure((IntPtr)(p + (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++)
{
unsafe
{
byte* p = (byte*)config.pRadioButtons;
Marshal.DestroyStructure((IntPtr)(p + (elementSize * i)), typeof(TaskDialogButton));
}
}
Marshal.FreeHGlobal(config.pRadioButtons);
}
}
return result;
}