PrintDialog not working on Windows 7

Updating a program of mine I noted that when I called the PrintDialog and passed it my PrintDocument (or variant thereof), I did not get any said PrintDialog.

Long story short - you just set the UseEXDialog to true:

PrintDialog _printDialog = new PrintDialog();
_printDialog.UseEXDialog = true;

See http://msdn.microsoft.com/en-us/library/system.windows.forms.printdialog.useexdialog.aspx for more info