Modules usually include functions or subroutines which are called from multiple objects (forms, reports, queries, etc.). Be sure to make them "Public".
A function can be called by setting the OnClick property to "=YourModuleFunctionName(YouArgument1, YourArgument2, etc.)" without the quotes. Alternatively, you can use VBA code in a form as follows:
Public Function YourButton_OnClick(Arg1,Arg2) as Integer
YourButton_OnClick = YourModuleFunctionName(Arg1,Arg2)
End Function
On Event YourButton_OnClick event, generate a subroutine which call a subroutine contained in a module, e.g.
Public Sub YourButton_OnClick
YourModuleSubroutineName(Arg1,Arg2)
End Sub
Hope this gets you started.
