Q2 : Declare Function Multiply_Add Lib “test” （ByRef A as i as integer ) as integer Q2.1:

Q2 : Declare Function Multiply_Add Lib “test” (ByRef A as i as integer ) as integer

Q2.1: Explain what is Declare Function used for ？

Ans :

Q2.2 : Explain the difference between ByRef and ByVal ？

Ans :

请帮忙给出正确答案和分析，谢谢！