Option button click with if else statment

I am trying to execute a program using if else statement on an option button to open a userform on a command button click. The following userforms are named as drilling, milling and so on. The trouble I am having is, the vba tell me my if else statements are wrong could some one show me the right way if i am doing something wrong

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Because you put the first IF/THEN on one line, that ends the entire IF statement. You must put the action after the THEN on another line in order to use ELSEIF. For example:

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You don't need the "= TRUE" part in each test, since an option button should be either True or False by nature.

You have a name conflict if you have ActiveX option buttons with the same names as forms. If that's the case, name the buttons as optDrilling, optMilling, etc.