Visual Studio 2010 and newer; Visual Assist build 2071 and newer
VA Snippets support input placeholders, which prompt for input when a snippet is expanded. By default, prompt dialogs are non-model. Force the dialogs to be modal by modifying the registry:
HKCU\Software\Whole Tomato\Visual Assist X\<IDE spec>\EditUserInputFieldsInEditor2 = 00
Change the value to 01 to restore default behavior.