Follow Steps:
1) Get the Standard Toolbar from Tools -> Customize Menu (I Think you might already have Standard Toolbar which includes save, save all, cut-copy-paste options).
2) at the end of the Standard ToolBar Strip; there is a veeery small down arrow., click on it. then select "Add or Remove Buttons"
3) Select "Standard" and select "Solution Configuration" from that menu.
you will get the combo in the Standard Toolbar for Setting the mode of the project.
hope it helps./,