VBA中的True和msoTrue有什么区别？

Question

I am working on a model with some VBA code that hides/shows shapes:

Worksheets("Sheet1").Shapes("shape1").Visible = msoTrue

A previous developer used msoTrue throughout the model instead of True which is what I have typically used in this type of application.

I am trying to understand the difference between True and msoTrue, and wonder if I should be using one or the other. I know that both equal -1.

Answer 1

msoTrue is a constant that evaluates to -1. In VBA it would be a Long type.

True is a Boolean type. When converted to a Long it also evaluates to -1.

Try this:

Debug.Print msoTrue '---> -1
Debug.Print True '---> True
Debug.Print Clng(True) '---> -1

It is somewhat odd to use msoTrue instead of True in a condition test, but -1, msoTrue and True will all be a true condition.

I should add that the Visibility property of the Shape object isn't a Boolean type, it's a Long of the enum msoTriState . If your question relates specifically, and only, to Shapes , then, yes, the more correct syntax would be msoTrue .