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CString message("This is an important message to the user.");

CString mainInstruction("Important!\nPlease read!");

CString title("Alert Dialog");

CTaskDialog taskDialog(message, mainInstruction, title,

    TDCBF_YES_BUTTON | TDCBF_NO_BUTTON | TDCBF_CANCEL_BUTTON );

// Setting new information to be able to reuse the dialog resource

taskDialog.SetWindowTitle(L"New title for the task dialog");

taskDialog.SetContent(L"New message to show the user.");

taskDialog.SetMainInstruction(L"Even more important!");

taskDialog.SetMainIcon(TD_ERROR_ICON);

taskDialog.SetDialogWidth(300);

// Add a footer

taskDialog.SetFooterText(L"Footer information for the dialog.");

taskDialog.SetFooterIcon(TD_INFORMATION_ICON);

// Add expansion information

taskDialog.SetExpansionArea(L"Additional information\non two lines.",

    L"Click here for more information.",

    L"Click here to hide the extra information.");

// Change the options to show the expanded information by default.

// It is necessary to retrieve the current options first.

int options = taskDialog.GetOptions();

options |= TDF_EXPANDED_BY_DEFAULT;

taskDialog.SetOptions(options);

taskDialog.DoModal();