private IntPtr MakeNewString(string text, TaskDialogNativeMethods.TaskDialogElements element)
{
var newStringPtr = Marshal.StringToHGlobalUni(text);
updatedStrings[(int)element] = newStringPtr;
return(newStringPtr);
}
private void UpdateTextCore(string s, TaskDialogNativeMethods.TaskDialogElements element)
{
AssertCurrentlyShowing();
FreeOldString(element);
SendMessageHelper(
TaskDialogNativeMethods.TaskDialogMessages.SetElementText,
(int)element,
(long)MakeNewString(s, element));
}
// Checks to see if the given element already has an updated string, and if so, frees it. This is done in preparation for a call to
// MakeNewString(), to prevent leaks from multiple updates calls on the same element within a single native dialog lifetime.
private void FreeOldString(TaskDialogNativeMethods.TaskDialogElements element)
{
var elementIndex = (int)element;
if (updatedStrings[elementIndex] != IntPtr.Zero)
{
Marshal.FreeHGlobal(updatedStrings[elementIndex]);
updatedStrings[elementIndex] = IntPtr.Zero;
}
}
