Application.GetOpenFilename

This method can return either False, a single filename or an array of filenames if multi-select=true

However the following lines of code will only work when Windows Language is English

This method automatically converts the returned value to a string using the Windows Regional Language
Use the Object Browser and check the type returned from the function or method.

For example Application.GetOpenFileName returns a Variant which can contain True or False
If you assign the returned value to a string data type the Boolean value is converted using WRS and will therefore not always equal "False"