你能在这个简单的 Excel VBA 语法中找到我的错误吗？

Question

I am following this tutorials example for my Excel sheet, and getting Run-time error '1004': Application-defined or object-defined error.

Here is my VBA.

Private Sub Worksheet_Calculate()
Worksheets("Input Quantities").Range("B51").Validation.InputMessage = Worksheets("Input Quantities").Range("B42")
End Sub

Answer 1

Notes (preserving the comments in an answer):

1. This code will fail if Range("B51") doesn't have any validation applied. ( your original error )
2. Since this is in the worksheet's code-behind, you can use Me instead of Worksheets("Input Quantities") . ( fixes the subscript out of range error - probably a misspelling of the sheet name, or a trailing space ).