Access KB: Access & VBA Topic

Arrays in Access VBA use a 0-based indice. UBound returns -1 if the array has no elements, 0 if it has 1, 1 if it has 2, etc.

In Access VBA, you have to add an empty string to the value being compared in order to get consistent results. For example, add &"" to your string varilable or it's code equivalent &vbNullString. Then compare to an empty string or verify it's length to 0 with Len.

By Reference or Value
For parameters, you can optionally specify ByVal or ByRef. ByRef is the default if you don't specify.

This article discusses a programming technique I used in a Microsoft Access database application to display a multiple page PDF document and make it position itself at a specific page.

Queries on a Microsoft Access database linked to MySQL tables failed with errors like ODBC--data out of range and the VBA code not recognizing fields from a sub-form query definition, insisting that it could not find the fields that I was referencing (Microsoft Access cannot find the field "fieldname" referred to in your expression).